CN113473562B

CN113473562B - Network switching method, system and related equipment

Info

Publication number: CN113473562B
Application number: CN202110725522.8A
Authority: CN
Inventors: 张健; 王海鹏; 王曼
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-07-22
Anticipated expiration: 2041-06-29
Also published as: WO2023273281A1; EP4351211A1; CN113473562A; CN115551029A; US20240129816A1

Abstract

The application discloses a network switching method which is applied to network slice management function equipment. The network slice management function device sends a resource request to a target network slice management function device, the resource request carries information of a source network slice subnet, receives a response aiming at the resource request sent by the target network slice management function device, and sends a switching configuration message to the source network slice subnet management function device. The response to the resource request includes information of the target network slice subnet, which includes an identification of the target network slice subnet, information of the target base station, and/or information of the target cell. Therefore, the service obtained by the user equipment switched to the target network slice subnet can meet the requirement of the source network slice subnet before switching.

Description

Network switching method, system and related equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a network switching method, system, and related device.

Background

With the rapid development of mobile communication, the differentiation of network service demands is more and more significant. To meet different types of Network service requirements, a physical Network is divided at an end-to-end level to form Network slices (Network slices). In a 5G (5th Generation) network, network slices can be divided into various types, such as enhanced Mobile Broadband (eMBB), Ultra High-Reliability and Low-Latency Communication (URLLC), mass Internet of Things (mass Internet of Things, MIoT), and the like, so as to provide different types of network service capabilities. And a Network Slice is composed of one or more Network Slice subnets (Network Slice subnets), such as a Radio Access Network (RAN) Network Slice Subnet, a Transport Network (TN) Network Slice Subnet, and/or a Core Network (CN) Network Slice Subnet.

With the development of network slicing technology and industry private networks, performance guarantee of network slicing and industry private networks becomes more and more important. In the conventional method for switching the network, a source base station in a radio access network determines a target serving cell to be switched by the UE, the target serving cell and the source serving cell can be provided by the same base station or different base stations.

Disclosure of Invention

The embodiment of the application provides a network slice, a method, a system and related equipment for managing a subnet of the network slice, so that the switching can meet the requirements of source network slices. .

In a first aspect, the present application provides a method for network slice management. In the method, a source network slice management function device sends a resource request to a target network slice management function device, wherein the resource request carries information of a source network slice subnet, and the resource request is used for requesting to provide resources in the target network slice subnet. The source network slice management function device receives a response aiming at the resource request sent by the target network slice management function device, the response aiming at the resource request comprises information of a target network slice subnet, the information of the target network slice subnet comprises information of a target base station, information of a target cell and an identifier of the target network slice subnet, and the information of the target network slice subnet is determined according to the information of the source network slice subnet. The source network slice management function device sends a switching configuration message to the source network slice subnet management function device, the switching configuration message contains information of a target network slice subnet, and the information of the target network slice subnet is used for indicating the source network slice subnet management function device to trigger a source base station to switch user equipment to be switched from a cell covered by the source base station to a cell covered by a target base station in a target network slice subnet, and an identifier of the target network slice subnet indicates the cell covered by the target base station in the target network slice subnet. By the method, the target network switching subnet is determined according to the information of the source network slicing subnet. Therefore, the service obtained by the user equipment switched to the target network slicing subnet can meet the requirement of the source network slicing subnet before switching.

In one possible design, the resource request also carries requirements of a service level agreement SLA of the source network slice and/or performance requirements of the source network slice subnet, and the requirements of the SLA of the source network slice and/or the performance requirements of the source network slice subnet are used to determine the performance requirements of the target network slice subnet. The response to the resource request further comprises: the method comprises the steps that the quantity of resources provided by a target cell and/or the performance guarantee capability provided by the target cell are determined according to the performance requirement of a target network slicing sub-network, and the performance guarantee capability provided by the target cell comprises throughput capability, packet loss rate capability, time delay capability and/or time delay jitter capability. The handover configuration message further comprises: the amount of resources provided by the target cell and/or the performance guarantee capability provided by the target cell, the amount of resources provided by the target cell and/or the performance guarantee capability provided by the target cell being used by the target base station to determine resources provided in the target network slice subnet. By the method, the resources provided by the target network slice subnet can meet the performance requirement of the source network slice subnet of the user equipment to be switched before switching, thereby ensuring the service experience of the user equipment after network switching.

In one possible design, the resource request further carries requirements for resources provided by the target network slice subnet, where the requirements for resources provided by the target network slice subnet include a quantity requirement for resources provided by the target network slice subnet, a requirement for a time period for providing resources provided by the target network slice subnet, a traffic flow requirement provided by the target network slice subnet, and/or a carrier frequency requirement provided by the target network slice subnet. The demand for resources provided by the target network slice subnet is used to request capabilities of resources provided by the target cell and/or the target base station, the capabilities of resources provided by the target cell and/or the target base station including: the capacity of the amount of uplink and/or downlink resources provided by the target cell and/or the target base station, the capacity of the traffic flow provided by the target cell and/or the target base station, the capacity of the time period of the resources provided by the target cell and/or the target base station, and the capacity of the carrier frequency provided by the target cell and/or the target base station. The response to the resource request further includes the capability of the resource provided by the target cell and/or the target base station, the capability of the resource provided by the target cell and/or the target base station is determined according to the requirement of the resource provided by the target network slice subnet, and the capability of the resource provided by the target cell and/or the target base station includes: the capability of the target cell and/or the target base station to provide the amount of uplink and/or downlink resources, the capability of the target cell and/or the target base station to provide traffic flow, the capability of the target cell and/or the target base station to provide the resource for the time period, and the capability of the target cell and/or the target base station to provide the carrier frequency. The handover configuration message further includes the capability of the target cell to provision resources on the target network slice subnet. The capability of the target cell for providing resources in the target network slice subnet is used for the target base station to determine the resources provided by the target cell in the target network slice subnet. By the method, the resources provided by the target network slice subnet can meet the performance requirement of the source network slice subnet of the user equipment to be switched before switching, thereby ensuring the service experience of the user equipment after network switching.

In a possible design, the resource request also carries information of the user equipment to be switched, and the information of the user equipment to be switched is used for determining the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell. The response to the resource request further comprises the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell. The switching configuration message further comprises a corresponding relation between the user equipment to be switched and the target base station and/or a corresponding relation between the user equipment to be switched and the target cell, and the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell are/is used for indicating that the user equipment to be switched is switched from the source base station and/or the source cell to the target base station and/or the target cell. By the method, the target base station to which the user equipment to be switched is determined according to the information of the user equipment, so that the allocation of the target base station to the user equipment to be switched is more reasonable, and the resource allocation provided for the target network slicing subnet in the switching process is more reasonable.

In one possible design, the resource request also carries the service quality information of the user equipment to be switched, and the service quality information of the user equipment to be switched is used for determining the quantity of resources provided by a target base station or a target cell for the user equipment to be switched; the corresponding relation between the user equipment to be switched and the target base station is the corresponding relation among the target base station, the user equipment to be switched and the quantity of resources provided by the target base station for the user equipment to be switched, and the corresponding relation among the target base station, the user equipment to be switched and the quantity of resources provided by the target base station for the user equipment to be switched is used for indicating the quantity of the resources provided by the target base station for the user equipment to be switched. By the method, the switched resources are distributed to the user equipment according to the service quality information of the user equipment, so that the service quality of the user equipment can be guaranteed.

In one possible design, the resource request further carries a handover reason, and the handover reason is used for determining whether to provide the resource of the target network slice subnet to the user equipment to be handed over. By the method, the resource request carries the switching reason, so that the target network slice management function equipment determines whether to provide the resources more reasonably.

In one possible design, the network slice management function device receives resource utilization and/or performance metrics for a source network slice subnet. And the network slice management function equipment determines a switching strategy for switching the user equipment to be switched from the source network slice subnet to the target network slice subnet according to the resource utilization rate and/or the performance index of the source network slice subnet and the preset condition of the resource utilization rate and/or the preset condition of the performance index, wherein the switching strategy comprises the content carried in the resource request. By the method, the network slice management function device root determines the switching strategy according to the resource utilization rate and/or the performance index of the source network slice subnet, so that the determination of the switching strategy is more reasonable.

In one possible design, the handover configuration message further includes: the reason for handover. The switching reason is used for indicating the source base station to determine whether to trigger the user equipment to be switched which is accessed into the source network slicing subnet to be switched to the target network slicing subnet through the target base station. By the method, the resource request carries the switching reason, so that the source base station can determine whether to provide the resource more reasonably.

In one possible design, sending the resource request to the target network slice management function device includes: and sending a resource request to the target network slice management function device according to the network deployment requirement of the source network slice, the resource planning of the source network slice and/or the service peak value resource requirement loaded on the source network slice.

In one possible design, the source network slice management function device sends a resource request through the source communication service management function device and the target communication service management function device, and receives a response to the resource request; or

The source network slice management function device sends a resource request to the target communication service management function device, and receives a response to the resource request sent by the target communication service management function device.

Or the source network slice subnet management function device sends the resource request to the target communication service management function device, and receives the response aiming at the resource request sent by the target communication service management function device.

In a second aspect, an embodiment of the present application provides a network switching method, which is applied to a target network slice management function device. The method comprises the steps that a target network slice management function device receives a resource request, the resource request carries information of a source network slice subnet, and the resource request is used for requesting to provide resources in the target network slice subnet. Then, the target network slice management function device determines information of the target network slice subnet according to the information of the source network slice subnet, wherein the information of the target network slice subnet comprises information of a target base station, information of a target cell and an identifier of the target network slice subnet. Then, the target network slice management function device transmits a response to the resource request, the response to the resource request including: and the information of the target network slice subnet is used for indicating the source network slice subnet management function device to trigger the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target base station in the target network slice subnet, and the identifier of the target network slice subnet indicates the cell covered by the target base station in the target network slice subnet. By the method, the target network switching subnet is determined according to the information of the source network slicing subnet. Therefore, the service obtained by the user equipment switched to the target network slicing subnet can meet the requirement of the source network slicing subnet before switching.

In one possible design, the resource request also carries the requirements of the service level agreement SLA of the source network slice and/or the performance requirements of the subnet of the source network slice. The target network switching management equipment further determines the performance requirement of the target network slice subnet according to the SLA requirement of the source network slice and/or the performance requirement of the source network slice subnet, and sends a resource requirement request to the target network slice subnet management function equipment, wherein the resource requirement request carries the performance requirement of the target network slice subnet. Then, the target network switching management device receives a response to the resource demand request sent by the target network slice subnet management function device, where the response to the resource demand request includes the resource quantity provided by the target base station and/or the performance guarantee capability provided by the target base station, which is determined according to the performance demand of the target network slice subnet, and the performance guarantee capability provided by the target cell includes throughput capability, packet loss rate capability, delay capability, and/or delay jitter capability. The response to the resource request further comprises: the amount of resources provided by the target cell and/or the performance guarantee capability provided by the target cell. By the method, the resources provided by the target network slice subnet can meet the performance requirement of the source network slice subnet of the user equipment to be switched before switching, thereby ensuring the service experience of the user equipment after network switching.

In one possible design, the resource request further carries a requirement of the source network sliced subnet for a resource provided by the target network sliced subnet, and the requirement of the resource provided by the target network sliced subnet includes a requirement of an amount of the resource provided by the target network sliced subnet, a requirement of a time period for providing the resource provided by the target network sliced subnet, a requirement of a traffic flow provided by the target network sliced subnet, and/or a requirement of a carrier frequency provided by the target network sliced subnet. The target network slice management device further sends a resource demand request to the target network slice subnet management function device, where the resource demand request includes a demand for resources provided by the target network slice subnet, and the demand for resources provided by the target network slice subnet is used to request a demand for resources provided by the target cell and/or the target base station, and the demand for resources provided by the target cell and/or the target base station includes: the number of uplink and/or downlink resources provided by the target cell and/or the target base station, the traffic flow provided by the target cell and/or the target base station, the time period of the resources provided by the target cell and/or the target base station, and the carrier frequency provided by the target cell and/or the target base station.

The target network slice management device further receives a response to the resource demand request sent by the target network slice subnet, the response to the resource demand request includes the capability of the target cell and/or the target base station for providing the resource in the target network slice subnet, the capability of the target cell and/or the target base station for providing the resource in the target network slice subnet is determined according to the demand for the resource in the target network slice subnet, and the capability of the target cell and/or the target base station for providing the resource in the target network slice subnet includes: the capability of the target cell and/or the target base station to provide the amount of uplink and/or downlink resources, the capability of the target cell and/or the target base station to provide traffic flow, the capability of the target cell and/or the target base station to provide the resource for the time period, and the capability of the target cell and/or the target base station to provide the carrier frequency. The response to the resource request further includes the capability of the target cell to provide the resources in the target network slice subnet, and the capability of the target cell to provide the resources in the target network slice subnet is used by the target base station to determine the resources provided by the target cell in the target network slice subnet. By the method, the resources provided by the target network slice subnet can meet the performance requirement of the source network slice subnet of the user equipment to be switched before switching, thereby ensuring the service experience of the user equipment after network switching.

In one possible design, the resource request also carries information of the user equipment to be handed over. The target network slice management device further sends a resource requirement request to the target network slice subnet management function device, wherein the resource requirement request contains information of the user equipment to be switched, and the information of the user equipment to be switched is used for determining the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell. The target network slice management equipment receives a response aiming at the resource requirement request sent by the target network slice subnet management function equipment, and the response aiming at the resource requirement request further comprises the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell. The response to the resource request further comprises the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell. By the method, the target base station to which the user equipment to be switched is determined according to the information of the user equipment, so that the distribution of the user equipment to be switched to the target base station is more reasonable, and the resource distribution provided to the target network slicing subnet in the switching process is more reasonable.

In one possible design, the resource request also carries quality of service information of the user equipment to be handed over. The resource requirement request further comprises service quality information of the user equipment to be switched, and the service quality information of the user equipment to be switched is used for determining the quantity of resources provided by the target base station for the user equipment to be switched. The corresponding relation between the user equipment to be switched and the target base station is the corresponding relation among the target base station, the user equipment to be switched and the quantity of resources provided by the target base station for the user equipment to be switched, and the corresponding relation among the target base station, the user equipment to be switched and the quantity of resources provided by the target base station for the user equipment to be switched is used for indicating the quantity of the resources provided by the target base station for the user equipment to be switched. By the method, the switched resources are distributed to the user equipment according to the service quality information of the user equipment, so that the service quality of the user equipment can be guaranteed.

In a third aspect, an embodiment of the present application provides a method for network handover, which is applied to a target network slice subnet management function device. In the method, a target network slice subnet management function device receives a resource demand request sent by the target network slice management function device, wherein the resource demand request carries information of a determined target network slice subnet, and the information of the target network slice subnet comprises: the identification of the target network slice subnet, the information of the target base station and the information of the target cell, wherein the information of the target network slice subnet is determined according to the information of the source network slice subnet. The target network slice subnet management function device sends a response aiming at the resource demand request, the response to the resource demand request carries the information of the target network slice subnet, and the information of the target network slice subnet is used for indicating the source network slice subnet management function device to trigger the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target base station in the target network slice subnet, and the identifier of the target network slice subnet indicates the cell covered by the target base station in the target network slice subnet. By the method, the target network switching subnet is determined according to the information of the source network slicing subnet. Therefore, the service obtained by the user equipment switched to the target network slice subnet can meet the requirement of the source network slice subnet before switching.

In one possible design, the resource requirement request also carries the performance requirements of the target network slice subnet. The target network slice subnet management function device further determines the amount of resources provided by the target cell and/or the performance guarantee capability provided by the target cell according to the performance requirement of the target network slice subnet, wherein the performance guarantee capability provided by the target cell includes throughput capability, packet loss rate capability, and/or delay capability. The response to the resource demand request further carries the resource quantity provided by the target base station and/or the performance guarantee capability provided by the target base station, and the resource quantity provided by the target cell and/or the performance guarantee capability provided by the target cell are used for the target base station to determine the resources provided in the target network slice subnet. By the method, the resources provided by the target network slice subnet can meet the performance requirement of the source network slice subnet of the user equipment to be switched before switching, thereby ensuring the service experience of the user equipment after network switching.

In one possible design, the resource requirement request further carries requirements for resources provided by the target network slice subnet, and the requirements for resources provided by the target network slice subnet include quantity requirements for resources provided by the target network slice subnet, requirements for time periods for which the resources are provided by the target network slice subnet, traffic flow requirements provided by the target network slice subnet, and/or carrier frequency requirements provided by the target network slice subnet. The target network slice subnet management function device further determines the capability of the resource provided by the target cell and/or the target base station according to the requirement of the resource provided by the target network slice subnet, and the capability of the resource provided by the target cell and/or the target base station includes: the capacity of the amount of uplink and/or downlink resources provided by the target cell and/or the target base station, the capacity of the traffic flow provided by the target cell and/or the target base station, the capacity of the time period of the resources provided by the target cell and/or the target base station, and the capacity of the carrier frequency provided by the target cell and/or the target base station. The response to the resource demand request further carries the capability of the target cell and/or the resource provided by the target base station, and the capability of the target cell and/or the target base station in the provided resource is used for the target base station to determine the resource provided by the target cell in the target network slice subnet. By the method, the resource provided by the target network slicing subnet can meet the performance requirement of the source network slicing subnet of the user equipment to be switched before switching, thereby ensuring the service experience of the user equipment after network switching.

In one possible design, the resource requirement request also carries information of the user equipment to be switched. The network slice subnet management function device further determines the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell according to the information of the user equipment to be switched. The response to the resource demand request further carries the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell. By the method, the target base station to which the user equipment to be switched is determined according to the information of the user equipment, so that the allocation of the target base station to the user equipment to be switched is more reasonable, and the resource allocation provided for the target network slicing subnet in the switching process is more reasonable.

In one possible design, the resource requirement request also carries quality of service information of the user equipment to be handed over. The network slicing subnet management function device further determines the quantity of resources provided by the target base station for the user equipment according to the service quality information of the user equipment to be switched. The corresponding relation between the user equipment to be switched and the target base station is the corresponding relation among the target base station, the user equipment to be switched and the quantity of resources provided by the target base station for the user equipment to be switched. By the method, the switched resources are distributed to the user equipment according to the service quality information of the user equipment, so that the service quality of the user equipment can be guaranteed.

In a fourth aspect, the present application provides a network slice management function device, including a functional module configured to perform any one of the methods of the first aspect or the second aspect; the present application does not limit the division of the functional modules, and the functional modules may be divided according to the flow steps of the method for network switching in the first aspect or the second aspect, or may be divided according to specific implementation requirements. As one example, the apparatus can include a receiving module, a processing module, and/or a transmitting module, among others. The functional modules may be implemented by hardware, or may be implemented by hardware executing corresponding software.

In a fifth aspect, the present application provides a network slice subnet management function device, which includes a functional module for executing the third aspect; the present application does not limit the division of the functional modules, and the functional modules may be divided according to the flow steps of the network switching method of the third aspect, or according to specific implementation requirements. As one example, the apparatus can include a receiving module, a processing module, and/or a transmitting module, among others. The functional modules may be implemented by hardware, or by hardware executing corresponding software.

In a sixth aspect, the present application provides a network slice management function device, which includes a memory storing program code and at least one processor calling the program code to perform any one of the methods of the first aspect or the second aspect. The device may also include a communication interface for communicating with other devices.

In a seventh aspect, the present application provides a network slice subnet management function device, which comprises a memory and at least one processor, wherein the memory stores program code, and the processor calls the program code to execute the method of the third aspect. The device may also include a communication interface for communicating with other devices.

In an eighth aspect, the present application provides a system for network slice management. The system comprises a network slice management function device and a network slice subnet management function device. The network slice management function device is configured to receive a first handover configuration message sent by the network slice management function device, where the first handover configuration message carries information including a target network slice subnet, and send a second handover configuration message to the source base station according to the first handover configuration message.

Optionally, the system further comprises: one or more source base stations. And any one of the one or more source base stations is used for receiving the second switching configuration message and sending a network switching request to the target base station according to the second switching configuration message.

In a ninth aspect, the present application provides a system for network slice management. The system comprises a network slice management function device and a network slice subnet management function device. Wherein the network slice management function device is a device for executing the method of the second aspect, and is a device for executing the method of the third aspect

In a tenth aspect, the present application provides a computer-readable storage medium having stored therein instructions that, when executed, enable a device (e.g., a network slice management function device) executing the instructions to implement any one of the methods of the first or second aspects of the present application.

In an eleventh aspect, the present application provides a computer-readable storage medium having stored therein instructions that, when executed, enable a device (e.g., a network slice management function device) executing the instructions to implement any of the methods of the third aspect of the present application.

In a twelfth aspect, the present application provides a method for network handover. The source base station receives second switching configuration information, the second switching configuration information comprises information of a target network slicing subnet, the information of the target network slicing subnet comprises information of the target base station, information of a target cell and identification of the target network slicing subnet, and the information of the target network slicing subnet is determined according to the information of the source network slicing subnet. And the source base station sends a switching instruction to the target base station according to the second switching configuration information, so that the identifier for switching the user equipment to be switched from the cell covered by the source base station to the target network slice subnet indicates the cell covered by the target base station in the target network slice subnet.

In a thirteenth aspect, an embodiment of the present application further provides a base station, including a receiving module and a sending module. The receiving module is used for receiving second switching configuration information, the second switching configuration information comprises information of a target network slice subnet, the information of the target network slice subnet comprises information of a target base station, information of a target cell and an identifier of the target network slice subnet, and the information of the target network slice subnet is determined according to the information of a source network slice subnet. The sending module is used for sending a switching instruction to the target base station according to the second switching configuration information, so that the identifier for switching the user equipment to be switched from the cell covered by the source base station to the target network slice subnet indicates the cell covered by the target base station in the target network slice subnet.

In a fourteenth aspect, an embodiment of the present application further provides a base station. The apparatus comprises a memory having program code stored therein and at least one processor that invokes the program code to perform the method of the twelfth aspect. The device may also include a communication interface for communicating with other devices.

In a fifteenth aspect, the present application provides a computer program product which, when run on a computer, causes the computer to carry out the method of any of the first or second aspects of the present application.

In a sixteenth aspect, the present application provides a computer program product for causing a computer to perform any of the methods of the third aspect of the present application when the computer program product is run on the computer.

In a seventeenth aspect, the present application provides a computer program product which, when run on a computer, causes the computer to carry out any of the methods of the twelfth aspect of the present application.

In an eighteenth aspect, the present application provides a chip, which when running, can implement any of the methods of the first or second aspects of the present application.

Nineteenth aspect of the present application provides a chip, wherein when the chip runs, any one of the methods of the third aspect of the present application can be implemented.

In a twentieth aspect, the present application provides a chip capable of implementing any of the methods of the twelfth aspect of the present application when the chip is in operation.

It should be understood that the various aspects of the design provided in this application are mutually referenced. The beneficial effects of the designs of the aspects provided by the present application can also be referred to each other, and are not described in detail.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

Fig. 1 is a schematic system architecture diagram of a network slice management system according to an embodiment of the present application;

fig. 2A is an architecture diagram of a network device according to an embodiment of the present application;

fig. 2B is a schematic diagram of a system including a source network slice management system and a target network slice management system according to an embodiment of the present application;

fig. 2C is another schematic structural diagram of a network slice management system and a network slice management system provided in the embodiment of the present application.

Fig. 2D is another schematic structural diagram of a network slice management system and a network slice management system provided in the embodiment of the present application.

Fig. 3 is a flowchart of a network handover method according to an embodiment of the present application;

fig. 4 is a flowchart of another network handover method according to an embodiment of the present application;

fig. 5 is a flowchart of another network handover method according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another source network slice management function device, a source base station, a target network slice management function device, and a target network slice subnet management function device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another source network slice management function device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another target network slice management function device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of still another target network slice subnet management function device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a source base station according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings.

The method can be applied to 5th generation (5G) mobile communication network architecture or future networks, and can be used for switching the terminal between network slices.

To facilitate an understanding of the present application, some concepts related to network slicing techniques are first introduced herein.

Network slicing: the network is a logical network which is customized on the basis of physical or virtual network infrastructure and has different network capabilities and network characteristics according to different service requirements. The network slice can be a complete end-to-end network comprising the terminal, the RAN, the TN, the CN and the application server, can provide communication service and has certain network capability; the network slice may also be any combination of the above terminals, RAN, TN, CN and application server, e.g., the network slice contains only RAN and CN.

Network slicing subnet: the network slice subnet is a logic network formed by combining and configuring a plurality of network functions and corresponding network resource groups, and can provide network services. A network slice subnet is an integral part of a network slice.

Network Slice Instance (Network Slice Instance, NSI): the method is a logic network which is actually deployed and can meet certain network characteristics or service requirements. One network slice instance may provide one or more services. One Network Slice Instance may provide a complete end-to-end Network service, and what constitutes the Network Slice Instance may be a Network Slice Subnet Instance (NSSI) and/or a Network function. The network functions may include physical network functions and/or virtual network functions. Hereinafter, the physical network function and/or the virtual network function are collectively referred to as a network function.

Network slice subnet instance: the network slice subnet instance may not need to provide complete network service end to end, and the network slice subnet instance may be a collection of network functions of the same device in the network slice instance, or may be a collection of network functions divided by domains, such as a CN network slice subnet instance, a RAN network slice subnet instance, or may be a collection composed of other manners. A network slice instance may be composed of a number of network slice subnet instances, each network slice subnet instance composed of a number of network functions and/or a number of network slice subnet instances; a network slice instance may consist of several network slice subnet instances and network functions that are not divided into network slice subnet instances; it is also possible that one network slice instance consists of only a few network functions.

Communication service: a combination of communication capabilities and their corresponding management capabilities overlaid to the user to meet specific traffic needs for an end-to-end network or network slice.

Communication service instance: a set of predefined users (a defined group of users) of a runtime communication service.

Non-public networks: the PLMN network may be independent or a network sharing the PLMN network with respect to the PLMN network owned and operated by the operator.

And (3) closing an access group: in PNI-NPN, RAN, AMF perform access control and mobility management based on CAG Id. In PNI-NPN, only UEs in the CAG may access the network.

Non-Public networks (NPN, also known as industry private Network), NPN mainly includes two types: an independent Non-Public Network SNPN (Stand-alone Non-Public Network) and a Public Network Integrated Non-Public Network (PNI-NPN). SNPN is operated by an NPN operator (or industry tenant) without relying on Network functions provided by a Public Land Mobile Network (PLMN). PNI-NPN refers to a non-public network with PLMN support deployed. In PNI-NPN, industry tenants and PLMN operators can share RAN, share CN user plane and/or CN control plane, and operate and manage based on 5G network slice. The PNI-NPN can be used as a network slice or a network slice subnet according to different sharing modes. For PNI-NPN, the cell managed by the base station gNB broadcasts a PLMN ID and a closed access group identifier (CAG ID). The cell is a PNI-NPN cell, and the UE allowed to access the CAG cell can also be called CAG UE. One UE may be allowed to access one or more CAG cells. RAN/AMF performs network/cell selection and access control, mobility management based on CAG. Based on the access control information configured by the operator, the CAG UE (end user) may also access the PLMN network to acquire services of the public network or be denied access to the PLMN network.

Fig. 1 is a schematic diagram of a system according to an embodiment of the present invention. Hereinafter, the devices in the system and the main functions of the devices applied in the embodiments of the present application are briefly described, and the embodiments of the present application will be further described in detail. The system may include a Communication Service Management Function (CSMF) device 101, a Network Slice Management Function (NSMF) device 102, and a Network Slice Subnet Management Function (NSSMF) device 103.

Among them, the CSMF device 101 has a function of managing a communication service, i.e., providing a communication service management service. Thus, the CSMF device 101 may also be referred to as a Communication Service Management Service Provider (CSMS _ Provider), or a Communication Service Management Service Producer (CSMS _ Producer). Specifically, the CSMF device 101 is configured to receive a communication service requirement of a user, and provide a communication service (i.e., deploy a communication service instance) according to the communication service requirement. The CSMF device 101 translates the communication service requirements into requirements for network slicing and sends the requirements for network slicing to the NSMF device 102. The user here may be in particular an operator and/or a third party customer, etc.

The NSMF device 102 has a management function of network slices, i.e., provides a network slice management service. Thus, the NSMF device 102 may also be referred to as a Network Slice Management Service Provider (NSMS _ Provider), or a Network Slice Management Service Producer (NSMS _ Producer). Specifically, the NSMF device 102 is configured to receive a demand for a network slice sent by the CSMF device 101, and provide the network slice (i.e., deploy a network slice instance) according to the demand for the network slice.

The NSMF device 102 may be further configured to acquire a performance guarantee policy of the network slice according to the requirement for the network slice, and execute the performance guarantee policy of the network slice. The NSMF device 102 may be further configured to obtain a performance monitoring policy of the network slice according to the requirement for the network slice, and perform performance monitoring on the network slice according to the performance monitoring policy. Optionally, the NSMF device 102 is configured to execute the performance guarantee policy when detecting a monitoring event in the performance monitoring policy.

The NSMF device 102 is further configured to decompose the demand for network slice into demands for network slice subnets and transmit the demands for network slice subnets to the corresponding NSSMF device 103. The NSSMF device 103 may be a RAN NSSFM device, a CN NSSMF device, or the like. For example, the NSMF device 102 decomposes this need for network slicing into a need for RAN network slicing subnets and a need for CN network slicing subnets. Further, the NSMF device 102 also sends the request for the RAN network slice subnet to the RAN NSSMF device and sends the request for the CN network slice subnet to the CN NSSMF device.

Fig. 1 exemplarily shows one NSSMF device, and the application is not limited to the number of devices in the system architecture.

The NSSMF device 103 has a function of managing the network-sliced subnets, i.e., provides a network-sliced subnet management service. Thus, the NSSMF device 103 may also be referred to as a Network Slice Subnet Management Service Provider (NSSMS _ Provider), or a Network Slice Management Service Producer (NSSMS _ Producer). Specifically, the NSSMF device 103 is configured to receive a requirement for a network slice subnet sent by the NSMF device 102, and provide the network slice subnet according to the requirement for the network slice (i.e., deploy a network slice subnet instance).

The NSSMF device 103 may also be configured to obtain a performance guarantee policy of the network slice subnet, and execute the performance guarantee policy of the network slice subnet. The NSSMF device 103 may further be configured to obtain a performance monitoring policy of the network slice subnet, and perform performance monitoring on the network slice subnet according to the performance monitoring policy of the network slice subnet.

Fig. 2A is an architecture diagram of a network deployment according to an embodiment of the present application. In fig. 2A, the NPN and PLMN use two base stations, gNB1 and gNB 2. The NPN shares the core network control plane (e.g., AMF, SMF, etc.) with the PLMN. The NPN uses the UPF1 and the data network DN 1. The gNB1 and the gNB2 provide radio access functionality. The AMF (not shown in the figure) is a core network access and mobility management function, and is responsible for functions of registration, access, mobility, authentication and the like of UEs (including CAG UEs). The session management function SMF is used for controlling the establishment, deletion or modification of session procedures for UEs including (CAG UEs). A user plane function UPF, by means of which user data is accessed to a data network dn (data network). The data network is a network provided by operator services, internet access or third party services, etc.

In the network deployed architecture shown in fig. 2A, the NPN operator leases dedicated carrier resources from the PLMN operator and applies for additional carrier resources as needed. Wherein the gNB1 provides dedicated carrier resources, allowing access only to CAG UEs. The gNB2 provides dedicated carrier resources and additional carrier resources allowing access for CAG UEs and non-CAG UEs (non-CAG UEs may be UEs accessing the PLMN network). In the scenario shown in fig. 2A, a CAG UE may switch from gNB1 to gNB2 or from gNB2 to gNB1, for example, UE1 switches from accessing the service of the private network to accessing the service of the PLMN network, and UE1 may also access the service of the private network through gNB 2.

Fig. 2B is a schematic structural diagram of a source network slice management system and a target network slice management system provided in an embodiment of the present application, which are combined with the CN domain network device and the RAN domain network device in fig. 2A. In fig. 2B, the network slice management system includes an NPN network slice management system and a PLMN network slice management system. The NPN network slice management system includes, as shown in fig. 1, a communication service management function device 101, a network slice management function device 102, a RAN domain network slice subnet management function device 103, and a CN domain network slice subnet management function device 103. The PLMN network slice management system comprises a communication service management function device 101-1, a network slice management function device 102-2, a network slice subnet management function device 103-1 and a network slice management function device 104-1. The base station 1 is a RAN domain device managed by a RAN domain network slice subnet management function device in the NPN, and provides a radio access network side service for a CAG UE accessing the NPN. The user plane function 1 is a device in the core network domain managed by the device with the network slice subnet management function in the CN domain in the NPN, and provides a user plane service on the core network side for the CAG UE. The base station 2 is a device shared by the NPN and the PLMN, and is managed by the RAN domain network slice subnet management function device management 103 in the NPN and the RAN domain network slice subnet management function device in the PLMN together. The base station 2 may communicate with a user plane function 1 and a user plane function 2. The user plane function 2 is a device in the core network domain managed by the CN domain network slice subnet management function device in the PLMN, and provides services for the PLMN. NPN-managed devices typically do not contain core network control plane functionality. The NPN typically shares control plane functions with the PLMN. Thus, user plane function 1 and user plane function 2 are both controlled by control plane function 1. The control plane function 1 is managed by the CN domain network slice subnet management function device 103-1 in the PLMN.

The NPN network slice management system shown in fig. 2B is used to manage the network slices and/or network slice subnets to which the NPN corresponds. And the PLMN network slice management system is used for managing the network slices and/or the network slice subnets corresponding to the PLMN. And the network slice and/or the network slice subnet corresponding to the PLMN can also provide services for the CAG UE covered by the NPN.

Fig. 2C is another schematic structural diagram of the network slice management system and the network slice management system according to the embodiment of the present disclosure. Unlike the schematic diagram in fig. 2B, the NPN network slice management system in fig. 2C does not include the communication service management function device 101, the network slice management function device 102 as shown in fig. 1. The NPN network slice management system in fig. 2C includes the RAN domain network slice subnet management function device 103, and the CN domain network slice subnet management function device 103. The NPN network slice subnet management function device in fig. 2C (e.g., RAN domain network slice subnet function device 103, CN domain network slice subnet function device 104) communicates with the PLMN network slice management function device 102-1. The NPN network slice management system in fig. 2C includes other devices and functions the same as those in fig. 2B, and the detailed description of the embodiments of the present application is omitted here. The PLMN network slice management system in fig. 2C includes the same devices and functions as those in fig. 2B, and the embodiments of the present application are not described in detail herein. In fig. 2C, the NPN RAN domain network slice subnet management function device may perform steps 403, 404, 407, 408, 501, 504, 505 performed by the network slice management function device in fig. 4 and 5 in communication with the PLMN NSMF.

Fig. 2D is a schematic structural diagram of a network slice management system and another structural diagram of the network slice management system provided in the embodiment of the present application. Unlike the schematic diagram in fig. 2B, the communication service management function device 101 in the NPN network slice management system in fig. 2D can communicate with the communication service management function device in the PLMN network slice management system. In conjunction with the embodiments of fig. 4 and 5 below, the resource request and the response to the resource request are transmitted or received by the communication service management function device 101 in the NPN network slice management system and the communication service management function device in the PLMN network slice management system.

Fig. 3 is a flowchart of a network switching method according to an embodiment of the present disclosure. The method flow is realized based on the structural schematic diagrams shown in fig. 2A-2D. The network switching method refers to a method for switching user equipment accessing a source network slicing subnet to a target network slicing subnet. The source network slice may be an NPN network slice or a PLMN network slice. A target web slice generally refers to a PLMN network slice that may provide resources to other network slices.

In conjunction with fig. 2A, 2B, 2C, or 2D, the source network slice management function device may be an NPN network slice management function device 102. The source network slice subnet management function device may be an NPN RAN domain NSSMF device, or may be an NSSMF of a PLMN RAN domain. The target network slice management function device may be a PLMN network slice management function device, and the target network slice subnet management function device may be a PLMN RAN domain network slice subnet management function device. As another implementation, the method shown in fig. 3 includes the following steps:

step 301, the source network slice function management function device sends a resource request to the target network slice function device, the resource request carries information of a source network slice subnet, and the resource request is used for requesting to provide resources in the target network slice subnet.

After the source network slice function management function device receives the resource utilization rate and/or the performance index of the source network slice subnet, a switching strategy for switching the user equipment to be switched in the source network slice subnet to the target network switching subnet is determined according to the resource utilization rate and/or the performance index of the source network slice subnet and the preset condition of the resource utilization rate and/or the preset condition of the performance index. And then sends a resource request to the target network slice management function device. The handover policy contains the content carried in the resource request. As an option, the source network slice management function device sends a resource request to the target network slice management function device according to a network deployment requirement of the source network slice, a resource planning of the source network slice, and/or a traffic peak resource requirement loaded on the source network slice.

And 302, the source network slice management function device receives a response aiming at the resource request sent by the target network slice management function device, wherein the response aiming at the resource request comprises the information of the target network slice subnet. The information of the target network slice subnet includes information of the target base station, information of the target cell (i.e., the cell covered by the target base station and associated with the target network slice subnet), and/or an identification of the target network slice subnet. The information of the target network slice subnet is determined according to the information of the source network slice subnet

Step 303, the source network slice management function device sends a switching configuration message to the source network slice subnet management function device, where the switching configuration message includes information of the target network slice subnet, and the information of the target network slice subnet is used to instruct the source network slice subnet management function device to trigger the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target base station in the target network slice subnet, and the identifier of the target network slice subnet indicates the cell covered by the target base station in the target network slice subnet.

Through the above embodiment, by determining the target network slice subnet, the user equipment accessing the source network slice subnet is switched to the target base station of the target network slice subnet. Therefore, the switched user equipment can enjoy the network quality of the target network slicing subnet, and the service quality of the user equipment after network slicing is ensured.

As shown in fig. 4, a network handover method according to an embodiment of the present application is provided. The flow of the method is realized based on any one of the structural schematic diagrams shown in fig. 2A-2D. The NPN NSMF corresponds to the NPN network slice management function device 102 in fig. 2B, the NPN RAN domain NSSMF device corresponds to the RAN domain network slice subnet management function device 103 in fig. 2B, and the NPN RANs correspond to one or more base stations 1 in fig. 2B. The PLMN NSMF corresponds to the network slice management function device 102-1 in the PLMN in fig. 2B, the PLMN RAN domain NSSMF corresponds to the RAN domain network slice sub-domain management function device 103-1 in fig. 2B, and the PLMN RANs corresponds to one or more base stations 2 in fig. 2B. The other devices in fig. 2 are not shown in fig. 4. In the method shown in fig. 4, the NPN NSMF determines that UEs (such as CAG UEs and other types of UEs) accessing the network through the NPN RANs are handed over to the PLMN RANs according to the acquired performance and resource utilization provided by the NPN RANs. The method shown in fig. 4 comprises the following steps:

step 401. one or more NPN RANs (such as base station 1 in fig. 2B) send measurement information related to a network slice to an NPN RAN domain NSSMF. The related measurement information of the network slice includes the identification of the network slice, the performance measurement information related to the requirement of the RAN network slice subnet, and the resource utilization rate of the network slice in the corresponding RAN.

The information sent by the NPN RAN to the NPN RAN domain NSSMF may also carry an Identifier of the Network Slice, such as Single Network Slice Selection auxiliary information (S-NSSAI), an Identifier (Identifier, ID) of a Network Slice Instance (NSI), and the like.

The measurement information related to the network slice includes performance measurement information and/or measurement information of resource utilization. The performance measurement information may be measurement values such as delay, throughput, and/or packet loss rate. The resource utilization refers to utilization of an air interface resource of the radio access network, for example, a ratio of an air interface resource (for example, the number of physical resource blocks) used in a designated RAN network slice subnet to an air interface resource allocated to the RAN network slice subnet.

Further, the measurement information related to the network slice further includes information of a cell and/or information of a base station. The information of the cell and/or the base station indicates that the relevant measurement information is the relevant measurement information of the network slice supported by the cell and/or the base station.

It should be noted that, the NPN RANs may transmit the measurement information related to the network slice periodically, or may transmit the measurement information according to the information of the corresponding performance index of the corresponding slice. For example, when a certain performance indicator of a network slice exceeds a preset threshold, the corresponding RAN may send the performance indicator and the resource utilization rate based on the slice.

And step 402, the NPN RAN domain NSSMF sends the resource utilization rate and the performance index of the network slice subnet to the NPN NSMF.

After receiving the measurement information related to the network slice sent by one or more base stations, the NPN RAN domain NSSMF generates the resource utilization rate and/or performance index of the network slice subnet according to the received measurement information related to the network slice, and sends the resource utilization rate and/or performance index to the NSMF. For example, the NPN RAN domain NSSMF may generate the resource utilization and/or the performance index for the corresponding network slice subnet according to the received measurement information for the same network slice subnet. The resource utilization rate and/or the performance index of the network slice subnet may be statistical information or aggregate information such as an average value, a maximum value, or a minimum value of the resource utilization rate or the performance index performance measurement information sent by each RAN. The resource utilization and/or performance index of the network slice subnet may be statistical information or aggregate information such as an average value, a maximum value, or a minimum value of the resource utilization or performance index of the cells (which may be of one cell or a plurality of cells) covered by the same base station of the network slice subnet, generated according to the information of the base station included in the related information of the network slice. The resource utilization or performance index of the network slice subnet may be set information for the resource utilization or performance index according to each base station or each cell of the network slice subnet.

Further, the NPN RAN domain NSSMF may also determine resource utilization or performance indicators of network slice subnets of different cells and/or different base stations. For example, the average value, the maximum value and/or the minimum value of the time delay of the network slice subnet under cell 1 under the gNB1, the average value, the maximum value and/or the minimum value of the throughput, and/or the average value, the maximum value and/or the minimum value of the packet loss rate, etc. In case the gNB1 supports two network slice subnets, e.g. S-NSSAI 1, S-NSSAI 2, the NPN RAN domain NSSMF may generate statistics for the two network slice subnets.

For another example, one network slice subnet corresponds to multiple cells, and the NPN RAN domain NSSMF may generate resource utilization or performance indexes for the network slice subnet based on different cells. For example, the average, maximum and/or minimum value of the delay of S-NSSAI 1 in cell a, the average, maximum and/or minimum value of the throughput, and/or the average, maximum and/or minimum value of the packet loss rate, etc., or the average, maximum and/or minimum value of the delay of S-NSSAI 1 in cell B, the average, maximum and/or minimum value of the throughput, and/or the average, maximum and/or minimum value of the packet loss rate, etc. may be counted for multiple cells or multiple base stations.

And step 403, the NPN NSMF determines a handover strategy of the UE accessing the NPN network slice subnet according to the received resource utilization rate and/or performance index of the network slice subnet. The UE accessing the NPN network slice subnet may be a CAG UE, which is referred to as UE in this embodiment.

And the NPN NSMF determines the switching strategy of the CAG UE according to the performance index and the resource utilization rate of the network slice or the subnet of the network slice and/or the preset condition of network switching. The preset condition of network switching is a threshold configured on the NPN NSMF for performance and/or resource utilization of the network slice. When the usage of the network slice subnet exceeds the threshold, the UE is triggered to perform handover.

For example, the preset conditions for network handover are: the average end-to-end (E2 end, E2E) delay of the traffic carried by the network slice is >20ms or the delay of the subnet of the network slice is >5ms, and the resource utilization rate is > 80%, the NPN NSMF determines to request additional carrier resources and determines the handover strategy. For example, the NPN NSMF determines that a UE that has partial access to the NPN RAN needs to be handed over to another RAN. The content of the switching strategy comprises: information of a source network slicing subnet (e.g., S-NSSAI 1), performance requirements of the source network slicing subnet and/or requirements of a service level agreement SLA of the source network slicing, requirements for resources provided by a target network slicing subnet (e.g., 20 radio interface resources, a resource usage duration (e.g., 2 hours) and/or a coverage area (e.g., a cell 1 coverage area), a handover reason (e.g., an average E2E latency of a service >20ms, and a radio resource utilization rate > 80%), information of a user equipment to be handed over (e.g., the number of UEs (e.g., CAG UE1 to UE10) that need to be handed over to a target RAN (PLMN RAN)), an identifier of the UE to be handed over, a location of the UE to be handed over, and/or service quality QoS information/, etc. of the UE to be handed over.

The NSMF determines a switching strategy according to the performance index aiming at the time delay and/or the performance index aiming at the throughput which are sent by the NSSMF of the NPN RAN domain, the configured network slice requirement and/or the resource utilization rate of a network slice subnet and other information. For example, according to the above information, if it is evaluated and determined to switch 10 CAG UEs to PLMN RAN, the resource utilization of the network slice or the subnet of the network slice may reach below the preset threshold, and the delay and/or throughput, etc. may meet the requirement of the network slice.

And 404, the NPN NSMF sends a resource request to the PLMN NSMF according to the handover policy determined in step 403, so as to request the PLMN NSMF to provide resources in the target network slice subnet, so that the UE accessing the source network slice subnet uses the resources provided by the target network slice subnet after being handed over to the target network slice subnet.

The resource request includes information of the source network slice subnet. In addition, the resource request also includes the service level agreement SLA requirement of the source network slice and/or the performance requirement of the source network slice subnet, the requirement of the resource provided by the target network slice subnet, the information of the user equipment to be switched, the service quality information of the user equipment to be switched, and/or the switching reason.

The information of the source network slice subnet (which may be information of an NPN network slice subnet, such as network slice subnet information of an NPN RAN domain) is used for the PLMN NSMF to determine the information of the network slice subnet according to the information of the source network slice subnet. The information of the target network slicing subnet comprises information of the target base station, information of the target cell and an identification of the target network slicing subnet. The information of the source network slice subnet includes one or more of information such as a source network slice identifier, an identifier of the source network slice subnet, a type of the source network slice (e.g., eMBB slice), a source base station identifier list (e.g., gNB1), a source cell identifier list (e.g., cell 1), mapping relationship information between the UE and the source cell list, and the like. For example, the PLMN NSMF determines the type of the target network slice from the type of the source network slice. And the PLMN NSMF determines a target base station, a target cell and the like according to the source cell identification and/or the source base station identification and the adjacent cell relation of the source cell.

A requirement of a service level agreement SLA of a source network slice and/or a performance requirement of a subnet of the source network slice. The SLA requirements of the source network slice may be carried in ServiceProfile. The performance requirements of the source network slice subnet may be carried over to RAN SliceProfile. SLA requirements of the source network slice and/or performance requirements of the source network slice subnet include latency and/or throughput requirements. The requirements of the source network slice and/or the performance requirements of the source network slice subnets are used for the PLMN NSMF to determine the performance requirements of the target network slice subnets. For example, the source network slice requires E2E latency less than 20ms, and the PLMN NSMF may determine that the latency of the target network slice subnet is less than 5 ms. For example, the time delay of the source network sliced subnet is less than 5ms, and the PLMN NSMF may determine that the time delay of the target network sliced subnet is less than 5 ms. The PLMN MSMF may determine the requirements of the target network slice subnet according to the preconfigured data and the requirements of the source network slice. The PLMN MSMF may also determine the requirements of the source network sliced subnet as the requirements of the target network sliced subnet.

Demand for resources provided by the target network slice subnet: including a demand for an amount of resources provided by the target network slice subnet, a demand for a period of time to provide resources provided by the target network slice subnet, a demand for traffic flow provided by the target network slice subnet, and/or a demand for carrier frequencies provided by the target network slice subnet. For example, one or more of the following information is included: the amount of resources required by the target network slicing subnet (DL and/or UL resource requirements, such as 20 radio resource units), traffic flow requirements (such as 70Mbps/s), resource requirement period (such as 10:00 to 12:00), and/or carrier frequency (such as 1.8GHz band), and the like. The demand for resources provided by the target network slice subnet is used for the ability to request resources provided by the target cell. The capabilities of the resources provided by the target cell include: the capacity of the number of uplink and/or downlink resources (e.g., the number of resource blocks) provided by the target cell, the capacity of the traffic flow provided by the target cell, the capacity of the time period of the resources provided by the target cell, and the capacity of the carrier frequency provided by the target cell. For example, the resource requirement is 20 radio resource units, and the resource requirement time is 10: 00-12: 00, traffic flow requirements (e.g., 70Mbps/s), carrier frequency (e.g., 1.8GHz band), etc.

And the information of the user equipment to be switched is used for determining the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell. The user equipment information to be switched includes: the identity of the UE to be handed over (e.g. CAG UE1 to UE10), the number of UEs to be handed over (e.g. 10 UEs), the location information of the UE or the area to which the UE belongs (e.g. the cell or grid to which the UE belongs). The UE information may be used for the PLMN RAN domain NSSMF to allocate to the target base station according to one or more UEs to be handed over.

Specifically, the NPN NSMF determines the UE to be switched according to the acquired UE wireless measurement and/or the traffic information of the UE accessing the source network slice subnet. The NPN NSMF may obtain the UE wireless measurements and/or the traffic information of the UE accessing the source network sliced subnet from the NPN NSSMF. For example, the UE1 has large traffic and large consumed resources, and the UE1 is determined to be the UE to be switched; for another example, the UE2 determines that the UE2 is the UE to be handed over, when the radio measurement (Reference Signal Received Power RSRP measured by the UE) of the source cell is poor, but the radio condition measurement result of the target cell is good. For another example, the UE to be handed over is determined according to the radio measurement and the traffic measurement of the UE, the radio measurement value of the UE3 for the source cell is general and is close to the radio measurement value for the target cell, but the traffic of the UE3 is large and the load of the target cell is light, then the UE3 is determined as the UE to be handed over.

The reason for the handover is as follows: the preset condition of the network sliced subnet (which may also be referred to as a preset threshold of the network sliced subnet, for example, the average E2E delay of the service carried by the sliced subnet S-NSSAI 1 under the cell 1 is >20ms or the delay of the network sliced subnet is >5ms, or the radio resource utilization rate is > 80%). The switching reason is used for determining whether to distribute target network slice subnet resources to the UE and judging resources which can be provided by the target network slice subnet by the PLMN NSMF according to the switching reason, thereby determining whether to allow the UE accessing the source network slice subnet to switch.

And the QoS information of the user equipment to be switched is used for determining the quantity of resources provided by the target base station for the user equipment to be switched. The traffic QoS information includes one or more of the following information: service QoS identification, service QoS attributes (such as QoS attributes of video services, such as time delay, time delay jitter, throughput, packet loss rate and the like).

Step 405, after receiving the resource request, the PLMN NSMF sends a resource requirement request to the PLMN RAN domain NSSMF according to the information carried in the resource request, so as to request the PLMN RAN domain NSSMF to determine the resource provided by the target network slice subnet. The information included in the handover policy in step 404 may be carried in the resource request.

After receiving the resource request, the PLMN NSMF determines a PLMN RAN domain NSSMF according to the information of the network slice subnet, and sends a resource requirement request to the determined PLMN RAN domain NSSMF. For example, the PLMN NSMF determines a target network slice subnet according to a pre-configured target network slice (e.g., a network slice of a PLMN) that provides shared resources for the source network slice, and determines a target network slice subnet according to information of the source network slice subnet (e.g., determines the target network slice subnet according to area or location information of services of the source network slice subnet and information of the determined target network slice), and then sends a resource requirement request to a PLMN RAN domain NSSMF associated with the determined target network slice subnet. Or, the PLMN NSMF sends the resource requirement request to the PLMN RAN domain NSSMF associated with the determined target network slice subnet, according to a target network slice subnet configured in advance to provide shared resources for the source network slice subnet.

The PLMN NSMF may also determine information of the target network sliced subnet from the information of the source network sliced subnet. And carrying the information of the target network slice subnet in the resource demand request. The information of the target network slice subnet comprises information of the target base station, information of the target cell and an identifier of the target network slice subnet. The information of the target network slice subnet is used for indicating the source network slice subnet management function device to trigger the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target base station in the target network slice subnet.

Further, the resource request carries SLA requirements of the source network slice (e.g., NPN network slice) and/or performance requirements of the source network slice subnet. The NPN NSMF determines the performance requirement of the source network slice subnet according to the SLA requirement of the source network slice, and then determines the performance requirement of the target network slice subnet according to the performance requirement of the source network slice subnet. And the PLMN NSMF determines the requirements of the target network slice subnet according to the SLA requirements of the source network slice, and carries the determined requirements of the target network slice subnet in the resource requirement request. For example, the performance requirement of the source network slice is that the E2E latency is less than 20ms, and the PLMN NSMF determines that the performance requirement of the target network slice subnet (e.g., PLMN RAN domain network slice subnet) is less than 5 ms.

And if the performance requirement of the source network slice subnet carried in the resource request is met, the PLMN NSMF determines the performance requirement of the target network slice subnet according to the performance requirement of the source network slice subnet, and carries the performance requirement of the target network slice subnet in the resource requirement request. For example, the performance requirement of the source network sliced subnet is a delay of less than 5ms, and the PLMN NSMF determines that the performance requirement of the target network sliced subnet (e.g., PLMN RAN domain network sliced subnet) is a time of less than 5 ms.

Furthermore, the resource request carries a switching reason, the PLMN NSMF determines to provide the resources of the target network slice subnet to the user equipment to be switched according to the switching reason, and then the target network slice subnet sends the resource request.

Further, the resource request carries information of the UE to be switched, and the PLMN NSMF carries the information of the UE to be switched in the resource request message, so that the PLMN NSMF domain network slice subnet (target network slice subnet management function device) determines the corresponding relationship between the user equipment to be switched and the target base station and/or the corresponding relationship between the user equipment to be switched and the target cell. For example, the PLMN RAN domain NSSMF determines the corresponding target base station according to the location information of the UE to be switched, or determines the corresponding relationship between the UE to be switched and the target base station and/or the target cell according to the corresponding relationship information between the UE and the source base station and the corresponding relationship information between the source base station and the target base station and/or the target cell. Or the PLMN NSMF determines the corresponding relationship with the target base station according to the number of the UEs to be switched, for example, 5 UEs to be switched are allocated to the target base station 1, and the other 5 UEs to be switched are allocated to the target base station 2.

If the resource request carries the service QoS information of the UE, the PLNM NSMF carries the service QoS information of the UE in the resource requirement request, and the PLNM NSMF is used for determining the quantity of resources provided by the target base station for the user equipment to be switched. I.e. so that PLNM NSSMF determines the amount of resources for each UE based on the UE's traffic QoS information.

Further, the resource request carries a requirement for resources provided by the target network slice subnet. And the PLMN MSMF carries the requirement of the resource provided by the target network slice subnet in the resource requirement request.

Table one shows that the PLMN NSMF performs processing according to the information carried in the resource request, and carries the relevant information in the resource demand request.

Step 406, after receiving the resource demand request sent by the PLMN NSMF, the PLMN RAN domain NSSMF processes the information carried in the resource demand request, and then sends a response to the resource demand request to the PLMN NSMF.

After receiving the resource demand request, the PLMN RAN domain NSSMF determines the information of the resource provided by the target network slice subnet according to the information carried in the resource demand request and the preset information of the target network slice, and sends a response to the resource demand request to the PLMN RAN domain NSSMF. The response to the resource demand request includes: the information of the target network slice subnet comprises information of a target base station, information of the target cell and an identifier of the target network slice subnet, and the information of the target network slice subnet is determined according to the information of the source network slice subnet.

The preset information of the target network slice may be information of a target network slice subnet preconfigured by the NPN NSMF and the PLMN NSMF, for example, a type of a corresponding target slice subnet determined according to a type of a source network slice subnet, a target network slice subnet corresponding to the source network slice subnet determined according to a neighboring relationship of the base station and/or the cell and a network slice identifier. In the embodiment of the present application, the target network slice is a preconfigured network slice of a PLMN domain that can provide resources for the network slice of the NPN domain.

The resource requirement request also carries the performance requirements of the target network slice subnet. After receiving the resource demand request, the NSSMF in the PLMN RAN domain determines the quantity of resources provided by the target cell and/or the performance guarantee capability provided by the target cell according to the performance demand of the target network sliced subnet so as to support the performance demand of the PLMN RAN network sliced subnet. The amount of resources provided by the target cell includes the amount of resources provided by each target base station (e.g., base station 1 provides 8 resource units, and base station 2 provides 5 resource units). The performance guarantee capability provided by the target cell includes a throughput capability, a packet loss rate capability, and/or a delay capability. The PLMN RAN domain NSSMF may determine the capability of the number of resources that can be provided by each target base station according to the information of the source base station and/or the information of the UE accessing the source base station. For example, the number of users accessing the source base station 1 is large, and more UEs need to be switched to the target base station 1, so the target base station needs to provide more resources: for example, the target base station 1 needs to provide 8 resource units (e.g., resource blocks, RBs).

The PLMN RAN domain NSSMF determines that the performance guarantee capability (such as throughput requirement, packet loss requirement, and/or delay requirement) provided by the target cell may be: the PLMN RAN domain NSSMF determines the capability of each target RAN to provide throughput based on the requirement to support throughput for the PLMN RAN network sliced subnet. And the NSSMF determines the packet loss rate capability of each target RAN according to the requirement of supporting the packet loss rate of the PLMN RAN network slice subnet.

Further, the resource requirement request also carries information of UEs to be switched (such as an identifier of the UEs to be switched, the number of the UEs to be switched, and/or location information of the UEs to be switched), and the PLMN RAN domain NSSMF determines a corresponding relationship between the UE to be switched and the target base station and/or a corresponding relationship between the UE to be switched and the target cell according to the information of the UE to be switched. And the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell are carried in the response aiming at the resource requirement request by the PLMN RAN domain NSSMF. For example, PLMN RAN NSSMF may determine the target RAN or target cell (i.e. target cell) according to the location of the UE to be handed over, or may determine the target RAN or target cell according to the number of UEs to be handed over. For example, the PLMN RAN domain NSSMF allocates the UE1-UE3 to be handed over to the target RAN1 or target cell 1, and corresponds the UE4-UE8 to be handed over to the target RAN 2 or target cell 2.

And if the service QoS information of the UE to be switched in the resource requirement request message, the NSSMF of the PLMN RAN domain determines resources for the UE to be switched according to the QoS information of the UE to be switched. Such as determining the resources (e.g., the number of air interfaces) allocated to the UE to be handed over by the target base station. For example, the PLMN RAN domain NSSMF determines that the resource provided by the base station 1 to the UE1 is 2 radio resource units and the resource provided by the base station 1 to the UE2 is 1 radio resource unit according to the QoS information of the UE.

If the resource demand request message contains the demand information of the resources provided by the target network slice subnet, the PLMN RAN domain NSSMF determines the capacity of the resources provided by the target cell and/or the target base station according to the demand of the resources provided by the target network slice subnet, and carries the capacity of the resources provided by the target cell and/or the target base station in the demand request for the resources. The capability of the target cell and/or the target base station in providing resources is used for the target base station to determine the resources provided by the target cell in the target network slice subnet.

The demand information for the resources provided by the target network slice subnet includes: the capabilities of the target cell and/or target base station provided resources include: the capacity of the target cell and/or the target base station for the amount of uplink and/or downlink resources provided by the target cell and/or the target base station, the capacity of the target cell and/or the target base station for the traffic flow provided by the target cell and/or the target base station, the capacity of the target cell and/or the target base station for the carrier frequency provided by the target cell and/or the target base station requires the amount of resources provided by the target network slicing subnetwork, the capacity of the target cell and/or the target base station for the time period for providing resources provided by the target network slicing subnetwork, the traffic flow requirement provided by the target network slicing subnetwork, and/or the carrier frequency requirement provided by the target network slicing subnetwork.

Table two shows that the PLMN RAN domain NSSMF performs processing according to the information carried in the resource requirement request, and carries the relevant information in the response to the resource requirement request.

Watch 2

And step 407, after receiving the response to the resource demand request sent by the PLMN RAN domain NSSMF, the PLMN NSMF sends the content carried in the response to the resource demand request to the NPN NSMF.

The PLMN NSMF may directly send the response to the resource demand request to the NPN NSMF, or may send the content carried in the response to the resource demand request to the NPN NSMF through another message (for example, a response to the resource request).

And 408, after receiving the content carried in the response to the resource demand request by the PLMN RAN domain NSSMF, the NPN NSMF sends first switching configuration information to NPN RAN NSSMF according to the received content so as to trigger the UE to be switched to carry out switching.

The first handover configuration information comprises information comprised in a response to the resource request. For example, the first handover configuration information includes: the information of the target network slicing subnet, the resource information which can be distributed to the target network slicing subnet, the corresponding relation between the target base station and the UE to be switched and the resource providing the UE and/or the corresponding relation between the UE to be switched and the accessed source base station or source cell, and the corresponding relation between the UE and the target base station or target cell.

And 409, after receiving the first switching configuration information, the NPN RAN domain NSSMF sends second switching configuration information to each source base station.

The second handover configuration information sent to each source base station may include the same content as the first handover configuration information. Examples include: the information of the target network slice subnet, the resource information which can be allocated to the target network slice subnet, the corresponding relation between each target base station and the UE and the resource providing the UE, and/or the corresponding relation between the UE to be switched which has access to the source base station and the target base station.

As an alternative, the second handover configuration information sent to each source base station may also be different from the first handover configuration information. After receiving the first switching configuration information, the NSSMF in the NPN RAN domain determines the user equipment to be switched that is accessed to each source base station, and the second switching configuration information includes: the resource information which can be distributed to the target network slicing subnet is accessed to the corresponding relation between the user equipment to be switched of the source base station receiving the second switching configuration message and the target base station, and/or the corresponding relation between the user equipment to be switched of the source base station receiving the second switching configuration message and the target base station and the corresponding relation of the resource provided for the corresponding UE.

For example, the first handover configuration information includes the correspondence of the target base station 1 or target cell 1 and the UE1-3, and the target base station 2 or target cell 2 and the UE 4-6. The target cell 1 is a cell covered by the target base station 1, and the target cell 2 is a cell covered by the target base station 2. The second handover configuration information sent to the target base station 1 includes: target base station 1 or target cell 1 and UE1-3, but not target base station 2 or target cell 2 and UE 4-6. The second handover configuration information transmitted to the target base station 2 includes the target base station 2 or the target cell 2 and the UE4-6, but does not include the correspondence of the target base station 1 or the target cell 1 and the UE 1-3.

Step 410, after receiving the second handover configuration information, the source base station sends a network handover request to the target network base station according to the second handover configuration information. The network switching request carries information of a target network slicing subnet, information of UE to be switched and/or the capability of resources provided for the UE by a target base station or a target cell. As an option, the network handover request may also carry QoS information of the service of the UE to be handed over without carrying a requirement of the resource provided by the target base station to the UE, so that the target base station determines a source requirement allocated to the equal-handed over UE according to the QoS information of the service of the UE to be handed over.

And step 410', the target base station processes according to the network switching request after receiving the network switching request sent by the source base station.

The target base station processes the network handover request according to the prior art, and the embodiment of the present application is not described in detail herein.

And 411, the target base station sends a network switching response to the source base station.

And step 412, the source base station sends a switching instruction to the UE to be switched.

It is noted that steps 410 and 412 are not sequential in time.

Through the embodiment, the NPN NSMF triggers the UE accessing the source network slice to carry out network switching according to the performance and the resource utilization rate of the source network slice subnet reported by the source base station. And determining, by the NSSMF of the PLMN RAN domain, information of the target network slice subnet and the target base station according to SLA requirements of the source network slice and/or the network slice subnet and/or information of the UE to be switched. According to the method, the network switching can be based on the resource requirement of the source network slice subnet, so that the switching can not only meet the requirement of the source network slice, but also more reasonably distribute the resources in the target network slice and the network slice subnet after the switching, and ensure that the SLA requirement is met.

Fig. 5 is a method for network handover according to an embodiment of the present disclosure. The flow of the method is realized based on any one of the structural schematic diagrams shown in fig. 2A-2D. The NPN NSMF corresponds to the NPN network slice management function device 102 in fig. 2B or 2C, the NPN RAN domain NSSMF device corresponds to the RAN domain network slice subnet management function device 103 in any one of fig. 2B to 2D, and the NPN RANs corresponds to one or more base stations 1 in fig. 2B to 2D. PLMN NSMF corresponds to the network slice management function device 102-1 in PLMN in fig. 2B-2D, PLMN RAN domain NSSMF corresponds to the RAN domain network slice sub-domain management function device 103-1 in fig. 2B, and PLMN RANs corresponds to one or more base stations 2 of any of fig. 2B-2D. The other devices in fig. 2 are not shown in fig. 5. Unlike the method shown in fig. 4, in the method shown in fig. 5, the NPN NSMF sends a resource request to the PLMN NSMF based on information such as the requirement of network deployment, resource planning, and/or traffic peak resource requirement. The method shown in fig. 5 comprises the following steps:

and step 501, the NPN NSMF sends a resource request message to the PLMN NSMF to request the PLMN NSMF to distribute the resources of the target network slice subnet for the source network slice subnet.

And the NPN NSMF sends a resource request to the PLMN NSMF based on the information such as the requirement of network deployment, resource planning and/or service peak value resource requirement and the like. For example, the NPN NSMF determines to the PLMN NSMF based on the network deployment requirements, resource planning, and/or traffic peak resource requirements 7: 00-9: 00 is a time period of high demand of the source network slice subnet for network resources, and the shared resources are required to be applied to the target network slice subnet, so that the UE accessing the source network slice subnet can be switched to the target network slice subnet.

The resource request includes information of the source network slice subnet, service-level agreement (SLA) information of the source network slice and/or SLA requirement information of the source network slice subnet, and/or requirement information of resources provided by the target network slice subnet.

The detailed description of the information of the source network slice subnet, the SLA information of the source network slice subnet, and/or the requirement information of the resource provided by the target network slice subnet may refer to the description of step 401, and the embodiment of the present application is not described in detail herein.

Step 502, after receiving the resource request, the PLMN NSMF sends a resource demand request to the PLMN RAN domain NSSMF according to the information carried in the resource request, so as to request the PLMN RAN domain NSSMF to determine that the target network slice subnet provides resources.

After receiving the resource request, the PLMN NSMF determines a PLMN RAN domain NSSMF according to the information of the source network slice subnet, and sends a resource requirement request to the determined PLMN RAN domain NSSMF. For example, the PLMN NSMF determines a target network slice according to a pre-configured target network slice (e.g., a network slice of a PLMN) that provides resources for the source network slice, and determines a target network slice subnet according to information of the source network slice subnet (e.g., determines a target network slice subnet according to area or location information of services of the source network slice subnet and information of the determined target network slice). The PLMN NSMF then sends a resource requirement request to the determined PLMN RAN domain NSSMF associated with the target network slice subnet. Or the PLMN NSMF determines the target network slice subnet according to a target network slice subnet which is configured in advance and provides shared resources for the source network slice subnet, and sends a resource demand request to a PLMN RAN domain NSSMF related to the determined target network slice subnet.

The PLMN NSMF can also determine the information of the target network slice subnet according to the information of the source network slice subnet, and carries the information of the target network slice subnet in the resource demand request. The information of the target network slicing subnet comprises information of the target base station, information of the target cell and an identification of the target network slicing subnet. The information of the target network slice subnet is used for indicating the source network slice subnet management function device to trigger the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target base station in the target network slice subnet.

Further, the resource request carries SLA requirements of the source network slice (e.g., NPN network slice) and/or performance requirements of the source network slice subnet. The NPN NSMF determines the performance requirement of the source network slice subnet according to the SLA requirement of the source network slice, and then determines the performance requirement of the target network slice subnet according to the performance requirement of the source network slice subnet. The PLMN NSMF determines the requirements of the target network slice subnet according to the SLA requirements of the source network slice, and carries the determined requirements of the target network slice subnet in the resource requirement request. For example, the performance requirement of the source network slice is that E2E latency is less than 20ms, and the PLMN NSMF determines that the performance requirement of the target network slice subnet (e.g., PLMN RAN domain network slice subnet) is less than 5 ms.

And if the performance requirement of the source network slice subnet carried in the resource request is met, the PLMN NSMF determines the performance requirement of the target network slice subnet according to the performance requirement of the source network slice subnet, and carries the performance requirement of the target network slice subnet in the resource requirement request. For example, the performance requirement of the source network sliced subnet is a delay of less than 5ms, and the PLMN NSMF determines the performance requirement of the target network sliced subnet (e.g., PLMN RAN domain network sliced subnet) is a time of less than 5 ms.

Table three shows that the PLMN NSMF performs processing according to the information carried in the resource request, and carries the relevant information in the resource requirement request.

Watch III

Step 503, after receiving the resource demand request sent by the PLMN NSMF, the PLMN RAN domain NSSMF processes the request according to the information carried in the resource demand request, and then sends a response to the resource demand request to the PLMN NSMF.

After receiving the resource demand request, the PLMN RAN domain NSSMF determines the resources distributed to the source network slice subnet according to the information carried in the resource demand request, and sends a response aiming at the resource demand request to the PLMN RAN domain NSSMF. The response to the resource demand request includes: the information of the target network slice subnet, the resource information provided by the target network slice subnet to the source network slice subnet, and/or the information of the target base station or the target cell. The preset switchable network slice information may be information of a target network slice subnet pre-configured by the NPN NSMF and the PLMN NSMF.

In the embodiment of the present application, the target network slice is a preconfigured network slice of a PLMN domain that can provide resources for the network slice of the NPN domain. The preset information of the target network slice may be information of a target network slice subnet preconfigured by the NPN NSMF and the PLMN NSMF, for example, a type of a corresponding target slice subnet determined according to a type of a source network slice subnet, a target network slice subnet corresponding to the source network slice subnet determined according to a neighboring relationship of the base station and/or the cell and a network slice identifier. In the embodiment of the present application, the target network slice is a preconfigured network slice of a PLMN domain that can provide resources for the network slice of the NPN domain.

The resource requirement request also carries the performance requirements of the target network slice subnet. After receiving the resource demand request, the NSSMF in the PLMN RAN domain determines the quantity of resources provided by the target cell and/or the performance guarantee capability provided by the target cell according to the performance demand of the PLMN RAN network slice subnet carried in the resource demand request so as to support the performance demand of the PLMN RAN network slice subnet. . The amount of resources provided by the target cell includes the amount of resources provided by each target base station (for example, base station 1 provides 8 resource units, and base station 2 provides 5 resource units). The performance guarantee capability provided by the target cell includes a throughput capability, a packet loss rate capability, and/or a delay capability. The PLMN RAN domain NSSMF may determine the capability of the number of resources that can be provided by each target base station according to the information of the source base station and/or the information of the UE accessing the source base station. For example, the number of users accessing the source base station 1 is large, and more UEs need to be switched to the target base station 1, so that the target base station needs to provide more resources: for example, the target base station 1 needs to provide 8 resource units (e.g., resource blocks, RBs).

The PLMN RAN domain NSSMF determines the requirements (such as the requirements for throughput, the requirements for packet loss rate, and/or the requirements for delay) of the resource guarantee SLA provided by the target base station as follows: the PLMN RAN domain NSSMF determines the requirement of the throughput which can be provided by each target RAN according to the requirement of the throughput of the network slice subnet supporting the PLMN RAN. And the NSSMF of the PLMN RAN domain determines the requirement of the packet loss rate of each target RAN according to the requirement of supporting the packet loss rate of the PLMN RAN network slice subnet. And determining resources which can be provided by each target base station according to the information of the source base station and the information of the UE accessed to the source base station.

The demand information for the resources provided by the target network slice subnet includes: the capabilities of the target cell and/or target base station provided resources include: the capacity of the number of uplink and/or downlink resources provided by the target cell and/or the target base station, the capacity of the traffic flow provided by the target cell and/or the target base station, the capacity of the time period of the resources provided by the target cell and/or the target base station, the capacity of the carrier frequency provided by the target cell and/or the target base station requires the number of resources provided by the target network slice subnet, the capacity of the resource time period provided by the target network slice subnet, the traffic flow requirement provided by the target network slice subnet, and/or the carrier frequency requirement provided by the target network slice subnet.

If the resource requirement request message carries information of the target network slice subnet, the PLMN RAN domain NSSMF may carry the information of the target network slice subnet in a response to the resource requirement request. Or, the PLMN RAN domain NSSMF confirms the target network slice subnet, and carries the information of the target network slice subnet in the response to the resource requirement request.

Table four shows that the PLMN RAN domain NSSMF performs processing according to the information carried in the resource requirement request, and carries the relevant information in the response to the resource requirement request.

Watch four

And step 504, after receiving the response to the resource demand request sent by the PLMN RAN domain NSSMF, the PLMN NSMF sends the content carried in the response to the resource demand request to the NPN NSMF.

And 505, after receiving the content carried in the response to the resource demand request by the PLMN RAN domain NSSMF, the NPN NSMF sends first handover configuration information to NPN RAN NSSMF according to the received content, so as to trigger the UE to be handed over.

And step 506, after receiving the first switching configuration information, the NPN RAN domain NSSMF sends second switching configuration information to each source base station.

As an alternative, the second handover configuration information sent to each source base station may also be different from the first handover configuration information. The second handover configuration information includes: the resource information which can be distributed to the target network slicing sub-network, the corresponding relation between the corresponding target base station and the UE and the resource providing the UE, and/or the corresponding relation between the UE to be switched which has access to the source base station and the corresponding target base station.

Step 507, after receiving the configuration information of network switching, the source base station sends a switching request to the target network base station according to the configuration information of network switching. The network switching request carries information of a target network slicing subnet, information of UE to be switched and/or the requirement of resources provided by a target base station for the UE. As an option, the handover request may also carry QoS information of the service of the UE to be handed over without carrying a requirement of the resource provided by the target base station to the UE, so that the target base station determines a source requirement allocated to the equal-handover UE according to the QoS information of the service of the UE to be handed over.

After receiving the configuration information of network switching, the source base station sends a switching request to the target network base station according to the configuration information of network switching after determining that the use of the source network slice subnet meets the preset condition. The condition that the use of the source network slice subnet meets the preset condition may be: the usage of the network slice subnet is preset with a threshold (e.g. average E2E delay of service carried by slice subnet S-NSSAI 1 under cell 1 >20ms or delay of network slice subnet >5ms, or radio resource utilization > 80%).

Further, after determining that the use of the source network slicing subnet meets the preset condition, the UE to be switched and/or the requirement of the resource provided by the target base station to the UE are further determined. Therefore, the network handover request carries information of the target network slicing subnet, information of the UE to be handed over and/or a requirement of the resource provided by the target base station to the UE. As an option, the network handover request may also carry QoS information of the service of the UE to be handed over without carrying a requirement of the resource provided by the target base station to the UE, so that the target base station determines a source requirement allocated to the equal-handed over UE according to the QoS information of the service of the UE to be handed over.

And step 508, after receiving the network switching request sent by the source base station, the target base station processes the network switching request and sends a network switching response to the target base station to the source base station. .

The target base station processes the network handover request as a prior art, and the embodiment of the present application is not described in detail herein.

And 509, the source base station sends a network switching instruction to the determined UE to be switched.

It is worth noting that steps 507 and 509 do not have a chronological order.

Through the above embodiment, the NPN NSMF sends a resource request to the PLMN NSMF based on information such as a requirement of network deployment, resource planning, and/or a traffic peak resource requirement, and the NSSMF of the PLMN RAN domain determines information of a target network slice subnet and a target base station according to an SLA requirement of a source network slice subnet and/or information of a UE to be switched. And after the source base station determines that the switching condition is met, triggering to carry out network switching. According to the method, the network switching can be based on the requirement of the source network slice subnet on resources, so that the network switching can not only meet the requirement of the source network slice, but also more reasonably distribute the resources in the switching process.

In the embodiments shown in fig. 4 and 5, the source network slice is an NPN network slice and the target network slice is a PLMN network slice. It is worth to be noted that, in the present embodiment, the source network slice may also be a PLMN network slice, that is, the terminal may switch between the network-sliced subnets of the PLMN network slice, and the source network-sliced subnet and the target network-sliced subnet may be network-sliced subnets of CN domains of different network slices. The embodiments of the present application are not limited herein. In this application, the resource provided by the target network slice subnet may be an air interface resource, a computing resource (such as a CPU), a bandwidth resource, and/or a storage resource provided by the target network slice subnet of the RAN domain. The resources provided by the target network slice subnet may be computing resources (such as CPUs), bandwidth resources, and/or storage resources provided by the target network slice subnet of the CN domain.

Fig. 6 is a schematic structural diagram of a device for network slicing and network slicing subnet management according to an embodiment of the present application. The CSMF device 101, the NSMF device 102, the NSSMF device 103, and the base station in the present application may all adopt the structure of the computer device shown in fig. 9.

The computer device includes at least one processor 601 and memory 602, and may also include a communication bus 603, a communication interface 604, and an I/O interface 605. The processor may be a general purpose Central Processing Unit (CPU), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits configured to control the execution of programs in accordance with the teachings of the present application.

The communication bus may include a path that transfers information between the aforementioned components. A communication interface, using any transceiver or the like, for communicating with other devices or communication Networks, such as via ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), etc.

The Memory may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The memory is used for storing program codes for executing the scheme of the application and is controlled by the processor to execute. The processor is configured to execute program code stored in the memory.

In particular implementations, the processor may include one or more CPUs, each of which may be a single-Core (si — Core) processor or a multi-Core (multi-Core) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In particular implementations, the computer device may also include an input/output (I/O) interface, as one embodiment. For example, the output device may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The input device may be a mouse, a keyboard, a touch screen device, a sensing device, or the like.

The computer device may be a general purpose computer device or a special purpose computer device. In a specific implementation, the computer device may be a desktop computer, a portable computer, a network server, a Personal Digital Assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, a communication device, an embedded device, or a device with a similar structure as in fig. 9. The embodiment of the application does not limit the type of the computer equipment.

For the NSMF device 102 (such as a source network slice management function device) or the NSMF device 102-1 (such as a target network slice management function device), when the processor therein executes the program code stored in the memory, the NSMF device 102 may execute the method steps corresponding to the NSMF device 102 or the NSMF device 102-1 in all the above embodiments, and the specific execution process refers to the above embodiments, and is not described herein again.

For an NSSMF device 103 (such as a source network slice subnet management function device) or an NSSMF device 103-1 (such as a target network slice subnet management function device), when a processor therein executes program code stored in a memory, the NSSMF device 103 may perform the method steps corresponding to the NSSMF device 103 in all of the above embodiments, and the NSSMF device 103-1 may perform the method steps corresponding to the NSSMF device 103-1 in all of the above embodiments. For specific execution, reference is made to the above embodiments, which are not described herein again.

For the base station, when the processor therein executes the program code stored in the memory, the base station may execute the method steps corresponding to the base station in all the embodiments above, and the specific execution process refers to the embodiments above, and is not described herein again.

Fig. 7 is a schematic structural diagram of a network slice management function device (specifically, an NSMF device) according to an embodiment of the present application.

In an embodiment, the sending module 703 is configured to send a resource request to a target network slice management function device, where the resource request carries information of a source network slice subnet, and the resource request is used to request that a resource is provided in the target network slice subnet;

a receiving module 701, configured to receive a response to the resource request sent by the target network slice management function device, where the response to the resource request includes information of a target network slice subnet, the information of the target network slice subnet includes information of a target base station, information of a target cell, and an identifier of the target network slice subnet, and the information of the target network slice subnet is determined according to the information of the source network slice subnet.

The sending module 703 is further configured to send a switching configuration message to the source network sliced subnet management function device, where the switching configuration message includes information of a target network sliced subnet, and the information of the target network sliced subnet is used to instruct the source network sliced subnet management function device to trigger the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target base station in the target network sliced subnet, where the identifier indicates the cell covered by the target base station in the target network sliced subnet.

Optionally, the receiving module 701 is further configured to receive a resource utilization rate and/or a performance index of the source network slice subnet. The processing module 703 is configured to determine a switching policy for switching the to-be-switched user equipment from the source network sliced subnet to the target network sliced subnet according to the resource utilization rate and/or the performance index of the source network sliced subnet, and the preset condition of the resource utilization rate and/or the preset condition of the performance index, where the switching policy includes content carried in the resource request.

Specifically, the receiving module of the NSMF may perform the steps illustrated in fig. 4 or fig. 5, such as steps 402, 407, or 504, for the NPN NSMF to perform receiving. The processing module 702 may perform the step of NPN NSMF related determination in fig. 4 or fig. 5, such as step 403. The sending module 703 may execute the steps related to the NPN NSMF transmission in fig. 4 or fig. 5, such as steps 404, 408, 501, and 505.

Fig. 8 is a schematic structural diagram of a source network slice subnet management function device (specifically, an NSMF device 103) provided in this embodiment of the present application.

In an embodiment, the receiving module 801 is configured to receive a resource request, where the resource request carries information of a source network slice subnet, and the resource request is used to request that a resource is provided in a target network slice subnet. The processing module 802 is configured to determine information of a target network slice subnet according to the information of the source network slice subnet, where the information of the target network slice subnet includes information of a target base station, information of a target cell, and an identifier of the target network slice subnet. A sending module 803, configured to send a response to the resource request, where the response to the resource request includes: and the information of the target network slice subnet is used for indicating the source network slice subnet management function device to trigger the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target base station in the target network slice subnet, and the identifier of the target network slice subnet indicates the cell covered by the target base station in the target network slice subnet.

Specifically, the receiving module of the NSMF in fig. 8 may perform the step illustrated in fig. 4 or fig. 5, such as steps 404, 406, 501, or 503, for performing receiving by the PLMN NSMF. The processing module 802 may perform the steps of the PLMN NSMF related determination in fig. 4 or fig. 5. The sending module 803 may perform the steps related to PLMN NSMF transmission in fig. 4 or fig. 5, such as steps 405 or 502.

As shown in fig. 9, a schematic structural diagram of a source network slice subnet management function device (specifically, an NSMF device 103) provided in this embodiment of the present application is shown.

The receiving module 901 is configured to receive a resource demand request sent by a target network slice subnet management function device, where the resource demand request carries information of a determined target network slice subnet, and the information of the target network slice subnet includes: the identification of the target network slice subnet, the information of the target base station and the information of the target cell, wherein the information of the target network slice subnet is determined according to the information of the source network slice subnet. The sending module 902 is configured to send a response to the resource requirement request, where the response to the resource requirement request carries information of a target network slice subnet, and the information of the target network slice subnet is used to instruct the source network slice subnet management function device to trigger the source base station to switch the user equipment to be switched from a cell covered by the source base station to a cell covered by a target base station in the target network slice subnet, where the identifier indicates the cell covered by the target base station in the target network slice subnet.

The processing module is used for determining the quantity of resources provided by the target cell and/or the performance guarantee capability provided by the target cell according to the performance requirement of the target network slice subnet, wherein the performance guarantee capability provided by the target cell comprises throughput capability, packet loss rate capability and/or time delay capability. The response to the resource demand request further carries the resource quantity provided by the target base station and/or the performance guarantee capability provided by the target base station, and the resource quantity provided by the target cell and/or the performance guarantee capability provided by the target cell are used for the target base station to determine the resources provided in the target network slice subnet.

Specifically, the receiving module 901 of NSSMF in fig. 9 may perform the step illustrated in fig. 4 or PLMN NSSMF of fig. 5, such as step 405 or 502. The processing module 902 may perform the step of PLMN NSSMF in FIG. 4 or FIG. 5 regarding the determination. The sending module 903 may perform the steps related to PLMN NSMF transmission in fig. 4 or fig. 5, such as steps 406 or 503.

Fig. 10 is a schematic structural diagram of a source base station (specifically, NPN RAN) provided in this embodiment. The receiving module 1001 is configured to receive second handover configuration information, where the second handover configuration information includes information of a target network slice subnet, the information of the target network slice subnet includes information of a target base station, information of a target cell, and an identifier of the target network slice subnet, and the information of the target network slice subnet is determined according to the information of the source network slice subnet. The sending module 1002 is configured to send a handover instruction to the target base station according to the second handover configuration information, so that the identifier for switching the to-be-handed over user equipment from the cell covered by the source base station to the target network slice subnet indicates the cell covered by the target base station in the target network slice subnet.

It should be understood that my means of the devices corresponding to fig. 7 to fig. 10 is used to implement the related functions of the source NSMF device, the target NSMF device, the source base station, or the target NSSMF device in the foregoing embodiments, and details are not repeated. And these modules of the device may have the function of implementing the source NSMF device, the source base station, the target NSMF device, or the target NSSMF device in the foregoing embodiments.

In this embodiment, the source NSMF device, the source base station, the target NSMF device, or the target NSSMF device is represented in the form of a functional block. As used herein, a "module" may refer to an ASIC, an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other components that provide the described functionality. In a simple embodiment, those skilled in the art will appreciate that the NSMF device 104 may be implemented in the form shown in fig. 9. The function of the processing module 602 determining the performance guarantee policy for the network slice based on the demand for the network slice, for example, may be implemented by the processor 601 executing code stored in the memory 602.

In the description of the present application, a "/" indicates a relationship in which the objects associated before and after are an "or", for example, a/B may indicate a or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural.

Those of ordinary skill in the art will appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments covered by this application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, a division of modules into only one type of logical function may be implemented in practice in other ways, e.g., multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. Further, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may also be an electrical, mechanical or other form of connection.

Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, each functional module in the embodiments of the present application may be implemented in a form of hardware, or may be implemented in a form of a software functional module. These functional modules, if implemented in the form of software functional modules and sold or used as separate products, may be stored in a computer-readable storage medium. With this understanding in mind, the technical solutions of the present application may substantially or partially contribute to the prior art, or all or part of the technical solutions may be embodied in the form of a computer program product including one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program product is stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wirelessly (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or a data storage device, such as a server, data center, etc., that includes one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for network handover, the method comprising:

sending a resource request to target network slice management function equipment, wherein the resource request carries information of a source network slice subnet, and the resource request is used for requesting to provide resources in the target network slice subnet;

receiving a response to the resource request sent by the target network slice management function device, wherein the response to the resource request includes information of a target network slice subnet, the information of the target network slice subnet includes an identifier of the target network slice subnet, information of a target base station and/or information of a target cell, and the information of the target network slice subnet is determined according to the information of the source network slice subnet;

and sending a switching configuration message to a source network slice subnet management function device, wherein the switching configuration message comprises information of the target network slice subnet, and the information of the target network slice subnet is used for indicating the source network slice subnet management function device to trigger a source base station to switch user equipment to be switched from a cell covered by the source base station to a cell covered by a target base station in the target network slice subnet indicated by the identifier of the target network slice subnet.

2. The method of claim 1, wherein the resource request further carries a requirement of a Service Level Agreement (SLA) of a source network slice and/or a performance requirement of the source network slice subnet, and wherein the requirement of the SLA of the source network slice and/or the performance requirement of the source network slice subnet are used to determine the performance requirement of the target network slice subnet;

the response to the resource request further comprises: determining the quantity of resources provided by the target cell and/or performance guarantee capability provided by the target cell according to the performance requirement of the target network sliced subnet, wherein the performance guarantee capability provided by the target cell comprises throughput capability, packet loss rate capability, time delay capability and/or time delay jitter capability;

the handover configuration message further comprises: the amount of resources provided by the target cell and/or the performance guarantee capability provided by the target cell, the amount of resources provided by the target cell and/or the performance guarantee capability provided by the target cell being used by the target base station to determine resources provided in a target network slice subnet.

3. The method of claim 1, wherein the resource request further carries a requirement for a resource provided by the target network slice subnet, the requirement for the resource provided by the target network slice subnet comprising a quantity requirement for the resource provided by the target network slice subnet, a time period requirement for the resource provided by the target network slice subnet, a traffic flow requirement provided by the target network slice subnet, and/or a carrier frequency requirement provided by the target network slice subnet;

the requirement for resources provided by the target network slice subnet is used to request capabilities of resources provided by the target cell and/or the target base station, the capabilities of resources provided by the target cell and/or the target base station including: the capacity of the number of uplink and/or downlink resources provided by the target cell and/or the target base station, the capacity of the traffic flow provided by the target cell and/or the target base station, the capacity of the time period of the resources provided by the target cell and/or the target base station, and the capacity of the carrier frequency provided by the target cell and/or the target base station;

the response to the resource request further includes capabilities of resources provided by the target cell and/or the target base station, the capabilities of resources provided by the target cell and/or the target base station are determined according to the requirement of resources provided by the target network slice subnet, and the capabilities of resources provided by the target cell and/or the target base station include: the capacity of the number of uplink and/or downlink resources provided by the target cell and/or the target base station, the capacity of the traffic flow provided by the target cell and/or the target base station, the capacity of the time period of the resources provided by the target cell and/or the target base station, and the capacity of the carrier frequency provided by the target cell and/or the target base station;

the handover configuration message further includes capabilities of resources provided by the target cell at the target network slice subnet;

the capability of the target cell to provide resources in the target network slice subnet is used for the target base station to determine the resources provided by the target cell in the target network slice subnet.

4. The method according to any of claims 1-3, wherein said resource request further carries information of said user equipment to be handed over, said information of user equipment to be handed over being used to determine the correspondence between said user equipment to be handed over and said target base station and/or the correspondence between said user equipment to be handed over and said target cell;

the response to the resource request further comprises the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell;

the switching configuration message further includes a corresponding relationship between the user equipment to be switched and the target base station and/or a corresponding relationship between the user equipment to be switched and the target cell, and the corresponding relationship between the user equipment to be switched and the target base station and/or the corresponding relationship between the user equipment to be switched and the target cell are used for indicating that the user equipment to be switched is switched from the source base station and/or the source cell to the target base station and/or the target cell.

5. The method according to claim 4, wherein the resource request further carries QoS information of the UE to be handed over, and the QoS information of the UE to be handed over is used to determine the amount of resources provided by the target base station or the target cell for the UE to be handed over;

the corresponding relation between the user equipment to be switched and the target base station is the corresponding relation between the target base station, the user equipment to be switched and the quantity of the resources provided by the target base station for the user equipment to be switched, and the corresponding relation between the target base station, the user equipment to be switched and the quantity of the resources provided by the target base station for the user equipment to be switched is used for indicating the quantity of the resources provided by the target base station for the user equipment to be switched.

6. The method according to any of claims 1-3 and 5, wherein the resource request further carries a handover reason, and the handover reason is used for determining whether to provide the resource of the target network slice subnet to the user equipment to be handed over.

7. The method of any of claims 1-3, 5, further comprising:

receiving the resource utilization rate and/or the performance index of the source network slice subnet;

and determining a switching strategy for switching the user equipment to be switched from the source network slice subnet to a target network slice subnet according to the resource utilization rate and/or the performance index of the source network slice subnet and the preset condition of the resource utilization rate and/or the preset condition of the performance index, wherein the switching strategy comprises the content carried in the resource request.

8. The method of any of claims 1-3, wherein the handover configuration message further comprises: a reason for handover;

the switching reason is used for indicating the source base station to determine whether to trigger the user equipment to be switched, which is accessed to the source network slicing subnet, to be switched to the target network slicing subnet through the target base station.

9. The method of claim 8, wherein sending a resource request to a target network slice management function device comprises:

and sending a resource request to the target network slice management function device according to the network deployment requirement of the source network slice, the resource planning of the source network slice and/or the service peak value resource requirement loaded on the source network slice.

10. The method of claim 1, wherein the source network slice management function device sends the resource request through the source communication service management function device and the target communication service management function device, and receives the response to the resource request, or

The source network slice management function device sends the resource request to the target communication service management function device and receives the response aiming at the resource request sent by the target communication service management function device;

or the source network slice subnet management function device sends the resource request to the target network slice management function device, and receives the response to the resource request sent by the target network slice management function device.

11. A method for switching a network, which is applied to a target network slice management function device, the method comprising:

receiving a resource request, wherein the resource request carries information of a source network slice subnet, and the resource request is used for requesting to provide resources in a target network slice subnet;

determining information of a target network slice subnet according to the information of the source network slice subnet, wherein the information of the target network slice subnet comprises identification of the target network slice subnet, information of a target base station and/or information of a target cell;

sending a response to the resource request, the response to the resource request comprising: the information of the target network slice subnet is used for indicating a source network slice subnet management function device to trigger a source base station to switch user equipment to be switched from a cell covered by the source base station to a cell covered by a target base station in the target network slice subnet indicated by an identifier of the target network slice subnet.

12. The method of claim 11, wherein the resource request further carries requirements of a Service Level Agreement (SLA) of a source network slice and/or performance requirements of a subnet of the source network slice, and wherein the method further comprises:

determining the performance requirement of the target network slice subnet according to the SLA requirement of a source network slice and/or the performance requirement of the source network slice subnet;

sending a resource demand request to the target network slice subnet management function device, wherein the resource demand request carries the performance demand of the target network slice subnet;

receiving a response to the resource demand request sent by the target network slice subnet management function device, where the response to the resource demand request includes the number of resources provided by the target base station and/or the performance guarantee capability provided by the target base station, which is determined according to the performance demand of the target network slice subnet, and the performance guarantee capability provided by the target cell includes a throughput capability, a packet loss rate capability, a delay capability, and/or a delay jitter capability;

the response to the resource request further comprises: the amount of resources provided by the target cell and/or the performance guarantee capability provided by the target cell.

13. The method of claim 11, wherein the resource request further carries requirements of the source network slice subnet for resources provided by the target network slice subnet, the requirements of the resources provided by the target network slice subnet including a quantity requirement of the resources provided by the target network slice subnet, a requirement of the time period for which the resources are provided by the target network slice subnet, a traffic demand provided by the target network slice subnet, and/or a carrier frequency requirement provided by the target network slice subnet, the method further comprising:

sending a resource demand request to the target network slice subnet management function device, where the resource demand request includes demands for resources provided by the target network slice subnet, and the demands for resources provided by the target network slice subnet are used for requesting demands for resources provided by the target cell and/or the target base station, and the demands for resources provided by the target cell and/or the target base station include: a requirement of an amount of uplink and/or downlink resources provided by the target cell and/or the target base station, a requirement of traffic flow provided by the target cell and/or the target base station, a requirement of a time period of resources provided by the target cell and/or the target base station, and a requirement of a carrier frequency provided by the target cell and/or the target base station;

receiving a response to the resource demand request sent by the target network slice subnet, where the response to the resource demand request includes a capability of the target cell and/or the target base station for the resource provided by the target cell and/or the target base station in the target network slice subnet, and the capability of the target cell and/or the target base station for the resource provided by the target cell and/or the target base station in the target network slice subnet is determined according to the demand for the resource provided by the target network slice subnet, and the capability of the target cell and/or the target base station for the resource provided by the target cell and/or the target base station in the target network slice subnet includes: the capacity of the number of uplink and/or downlink resources provided by the target cell and/or the target base station, the capacity of the traffic flow provided by the target cell and/or the target base station, the capacity of the time period of the resources provided by the target cell and/or the target base station, and the capacity of the carrier frequency provided by the target cell and/or the target base station;

the response to the resource request further includes a capability of the resource provided by the target cell in the target network slice subnet, the capability of the resource provided by the target cell in the target network slice subnet is used by the target base station to determine the resource provided by the target cell in the target network slice subnet.

14. The method according to any of claims 11-13, wherein said resource request also carries information of said user equipment to be handed over, the method further comprising:

sending a resource requirement request to the target network slice subnet management function device, wherein the resource requirement request contains the information of the user equipment to be switched, and the information of the user equipment to be switched is used for determining the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell;

receiving a response to the resource requirement request sent by the target network slice subnet management function device, wherein the response to the resource requirement request further includes a corresponding relationship between the user equipment to be switched and a target base station and/or a corresponding relationship between the user equipment to be switched and the target cell;

the response to the resource request further comprises the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell.

15. The method according to claim 14, wherein the resource request further carries quality of service information of the user equipment to be handed over,

the resource requirement request further comprises the service quality information of the user equipment to be switched, and the service quality information of the user equipment to be switched is used for determining the quantity of resources provided by the target base station for the user equipment to be switched;

16. A method for switching a network is applied to a target network slice subnet management function device, and the method comprises the following steps:

receiving a resource demand request sent by target network slice management function equipment, wherein the resource demand request carries information of a determined target network slice subnet, and the information of the target network slice subnet comprises: the method comprises the steps that identification of a target network slice subnet, information of a target base station and/or information of a target cell are/is determined, wherein the information of the target network slice subnet is determined according to the information of a source network slice subnet;

sending a response aiming at the resource demand request to the target network slice management function device, wherein the response aiming at the resource demand request carries the information of the target network slice subnet, and the information of the target network slice subnet is used for indicating the source network slice subnet management function device to trigger the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target base station in the target network slice subnet indicated by the identification of the target network slice subnet.

17. The method of claim 16, wherein the resource requirement request further carries performance requirements of the target network slice subnet, the method further comprising:

determining the quantity of resources provided by the target cell and/or the performance guarantee capability provided by the target cell according to the performance requirement of the target network sliced subnet, wherein the performance guarantee capability provided by the target cell comprises throughput capability, packet loss rate capability, time delay capability and/or time delay jitter capability;

the response to the resource demand request further carries the number of resource blocks provided by the target base station and/or the performance guarantee capability provided by the target base station, and the number of resources provided by the target cell and/or the performance guarantee capability provided by the target cell are used for the target base station to determine the resources provided in the target network slice subnet.

18. The method of claim 16, wherein the resource requirement request further carries requirements for resources provided by the target network slice subnet, wherein the requirements for resources provided by the target network slice subnet include a quantity requirement for resources provided by the target network slice subnet, a requirement for a time period for providing resources provided by the target network slice subnet, a traffic requirement for the target network slice subnet, and/or a carrier frequency requirement for the target network slice subnet, and wherein the method further comprises:

determining the capability of the resource provided by the target cell and/or the target base station according to the requirement of the resource provided by the target network slice subnet, wherein the capability of the resource provided by the target cell and/or the target base station comprises: a capability of a number of uplink and/or downlink resources provided by the target cell and/or the target base station, a capability of traffic provided by the target cell and/or the target base station, a capability of a time period of resources provided by the target cell and/or the target base station, a capability of a carrier frequency provided by the target cell and/or the target base station;

the response to the resource demand request further carries the capability of the target cell and/or the resource provided by the target base station, and the capability of the target cell and/or the target base station in the provided resource is used for the target base station to determine the resource provided by the target cell in the target network slice subnet.

19. The method according to any of claims 16-18, wherein said resource requirement request also carries information of said user equipment to be handed over, the method further comprising:

determining the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell according to the information of the user equipment to be switched;

the response to the resource demand request further carries the corresponding relationship between the user equipment to be switched and the target base station and/or the corresponding relationship between the user equipment to be switched and the target cell.

20. The method according to claim 19, wherein the resource requirement request also carries quality of service information of the user equipment to be handed over, the method further comprising:

determining the quantity of resources provided by the target base station for the user equipment according to the service quality information of the user equipment to be switched;

the corresponding relationship between the user equipment to be switched and the target base station is the corresponding relationship between the target base station, the user equipment to be switched and the number of resources provided by the target base station for the user equipment to be switched.

21. The network slice management function device is characterized by comprising a receiving module and a sending module,

the sending module is used for sending a resource request to target network slice management function equipment, wherein the resource request carries information of a source network slice subnet, and the resource request is used for requesting to provide resources in the target network slice subnet;

the receiving module is configured to receive a response to the resource request sent by the target network slice management function device, where the response to the resource request includes information of the target network slice subnet, where the information of the target network slice subnet includes an identifier of the target network slice subnet, information of a target base station, and/or information of the target cell, and the information of the target network slice subnet is determined according to the information of the source network slice subnet;

the sending module is further configured to send a handover configuration message to a source network slice subnet management function device, where the handover configuration message includes information of the target network slice subnet, and the information of the target network slice subnet is used to instruct the source network slice subnet management function device to trigger the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target base station in the target network slice subnet indicated by the identifier of the target network slice subnet.

22. The apparatus of claim 21, wherein the resource request further carries a requirement of a Service Level Agreement (SLA) of a source network slice and/or a performance requirement of the source network slice subnet, and wherein the requirement of the SLA of the source network slice and/or the performance requirement of the source network slice subnet are used to determine the performance requirement of the target network slice subnet;

23. The device of claim 21, wherein the resource request further carries a requirement for a resource provided by the target network slice subnet, and wherein the requirement for the resource provided by the target network slice subnet comprises a requirement for an amount of the resource provided by the target network slice subnet, a requirement for a time period for which the resource is provided by the target network slice subnet, a requirement for traffic flow provided by the target network slice subnet, and/or a requirement for a carrier frequency provided by the target network slice subnet;

the response to the resource request further includes capabilities of resources provided by the target cell and/or the target base station, the capabilities of resources provided by the target cell and/or the target base station being determined according to the demand for resources provided by the target network slice subnet, the capabilities of resources provided by the target cell and/or the target base station including: the capacity of the number of uplink and/or downlink resource blocks provided by the target cell and/or the target base station, the capacity of the traffic flow provided by the target cell and/or the target base station, the capacity of the time period of the resources provided by the target cell and/or the target base station, and the capacity of the carrier frequency provided by the target cell and/or the target base station;

24. The apparatus of any one of claims 21-23, further comprising a processing module,

the receiving module is further configured to receive a resource utilization rate and/or a performance index of the source network slice subnet;

the processing module is configured to determine a switching policy for switching the to-be-switched user equipment from the source network sliced subnet to a target network sliced subnet according to the resource utilization rate and/or the performance index of the source network sliced subnet and the preset condition of the resource utilization rate and/or the preset condition of the performance index, where the switching policy includes content carried in the resource request.

25. The network slice management function equipment is characterized by comprising a receiving module, a processing module and a sending module,

the receiving module is used for receiving a resource request, wherein the resource request carries information of a source network slice subnet, and the resource request is used for requesting to provide resources in a target network slice subnet;

the processing module is used for determining information of a target network slice subnet according to the information of the source network slice subnet, wherein the information of the target network slice subnet comprises an identifier of the target network slice subnet, information of a target base station and/or information of the target cell;

the sending module is configured to send a response to the resource request, where the response to the resource request includes: and the information of the target network slicing subnet is used for indicating that the source network slicing subnet management function device triggers the source base station to switch the user equipment to be switched from the cell covered by the source base station to the cell covered by the target network slicing subnet, and the identifier of the target network slicing subnet indicates the cell covered by the target base station in the target network slicing subnet.

26. The apparatus of claim 25, wherein the resource request further carries requirements of a Service Level Agreement (SLA) of a source network slice and/or performance requirements of a subnet of the source network slice,

the processing module is further configured to determine a performance requirement of the target network slice subnet according to a requirement of an SLA of a source network slice and/or a performance requirement of the source network slice subnet;

the sending module is further configured to send a resource demand request to the target network slice subnet management function device, where the resource demand request carries a performance demand of the target network slice subnet;

the receiving module is further configured to receive a response to the resource demand request sent by the target network slice subnet management function device, where the response to the resource demand request includes the number of resource blocks provided by the target base station and/or the performance guarantee capability provided by the target base station, which is determined according to the performance demand of the target network slice subnet, and the performance guarantee capability provided by the target cell includes a throughput capability, a packet loss rate capability, a delay capability, and/or a delay jitter capability;

27. The device of claim 25, wherein the resource request further carries requirements of the source network slice subnet for resources provided by the target network slice subnet, wherein the requirements of the resources provided by the target network slice subnet include a quantity requirement of the resources provided by the target network slice subnet, a requirement of the time period for which the resources are provided by the target network slice subnet, a traffic flow requirement provided by the target network slice subnet, and/or a carrier frequency requirement provided by the target network slice subnet,

the sending module is further configured to send a resource demand request to the target network slice subnet management function device, where the resource demand request includes a demand for resources provided by the target network slice subnet, and the demand for resources provided by the target network slice subnet is used to request a demand for resources provided by the target cell and/or the target base station, and the demand for resources provided by the target cell and/or the target base station includes: a requirement of a number of uplink and/or downlink resource blocks provided by the target cell and/or the target base station, a requirement of a traffic flow provided by the target cell and/or the target base station, a requirement of a time period of resources provided by the target cell and/or the target base station, and a requirement of a carrier frequency provided by the target cell and/or the target base station;

the receiving module is further configured to receive a response to the resource demand request sent by the target network slice subnet, where the response to the resource demand request includes a capability of the target cell and/or the target base station for the resource provided by the target cell and/or the target base station in the target network slice subnet, and the capability of the target cell and/or the target base station for the resource provided by the target cell and/or the target base station in the target network slice subnet is determined according to the demand for the resource provided by the target network slice subnet, and the capability of the target cell and/or the target base station for the resource provided by the target cell and/or the target base station in the target network slice subnet includes: the capacity of the number of uplink and/or downlink resources provided by the target cell and/or the target base station, the capacity of the traffic flow provided by the target cell and/or the target base station, the capacity of the time period of the resources provided by the target cell and/or the target base station, and the capacity of the carrier frequency provided by the target cell and/or the target base station;

28. The apparatus according to any of claims 25-27, wherein said resource request also carries information of said user equipment to be handed over,

the sending module is further configured to send a resource requirement request to the target network slice subnet management function device, where the resource requirement request includes information of the user equipment to be switched, and the information of the user equipment to be switched is used to determine a corresponding relationship between the user equipment to be switched and the target base station and/or a corresponding relationship between the user equipment to be switched and the target cell;

the receiving module is further configured to receive a response to the resource requirement request sent by the target network slice subnet management function device, where the response to the resource requirement request further includes a corresponding relationship between the user equipment to be switched and a target base station and/or a corresponding relationship between the user equipment to be switched and the target cell;

the response to the resource request further includes a corresponding relationship between the user equipment to be switched and the target base station and/or a corresponding relationship between the user equipment to be switched and the target cell.

29. A network slice subnet management function device is characterized by comprising a receiving module and a sending module,

the receiving module is configured to receive a resource demand request sent by a target network slice subnet management function device, where the resource demand request carries information of a determined target network slice subnet, and the information of the target network slice subnet includes: the method comprises the steps that identification of a target network slicing subnet, information of a target base station and/or information of a target cell are/is carried out, and the information of the target network slicing subnet is determined according to the information of a source network slicing subnet;

the sending module is configured to send a response to the resource demand request, where the response to the resource demand request carries information of the target network slice subnet, and the information of the target network slice subnet is used to instruct a source network slice subnet management function device to trigger a source base station to switch a user equipment to be switched from a cell covered by the source base station to a cell covered by a target base station in the target network slice subnet indicated by an identifier of the target network slice subnet.

30. The apparatus of claim 29, wherein the resource requirement request further carries performance requirements of the target network slice subnet, wherein the apparatus further comprises a processing module,

the processing module is configured to determine, according to a performance requirement of the target network sliced subnet, the number of resources provided by the target cell and/or a performance guarantee capability provided by the target cell, where the performance guarantee capability provided by the target cell includes a throughput capability, a packet loss rate capability, a delay capability, and/or a delay jitter capability;

the response to the resource demand request further carries the resource quantity provided by the target base station and/or the performance guarantee capability provided by the target base station, and the resource quantity provided by the target cell and/or the performance guarantee capability provided by the target cell are used for the target base station to determine the resources provided in the target network slice subnet.

31. The device of claim 29, wherein the resource requirement request further carries requirements for resources provided by the target network slice subnet, wherein the requirements for resources provided by the target network slice subnet include a quantity requirement for resources provided by the target network slice subnet, a requirement for a time period for providing resources provided by the target network slice subnet, a traffic requirement for the target network slice subnet, and/or a carrier frequency requirement for the target network slice subnet, and wherein the device further comprises a processing module,

the processing module is configured to determine, according to the requirement for the resource provided by the target network slice subnet, a capability of the resource provided by the target cell and/or the target base station, where the capability of the resource provided by the target cell and/or the target base station includes: a capability of a number of uplink and/or downlink resources provided by the target cell and/or the target base station, a capability of traffic provided by the target cell and/or the target base station, a capability of a time period of resources provided by the target cell and/or the target base station, a capability of a carrier frequency provided by the target cell and/or the target base station;

the response to the resource demand request further carries the capability of the target cell and/or the resource provided by the target base station, and the capability of the target cell and/or the resource provided by the target base station is used for the target base station to determine the resource provided by the target cell in the target network slice subnet.

32. The apparatus according to any of the claims 29-31, wherein said resource requirement request further carries information of said user equipment to be switched, said apparatus further comprising a processing module,

the processing module is used for determining the corresponding relation between the user equipment to be switched and the target base station and/or the corresponding relation between the user equipment to be switched and the target cell according to the information of the user equipment to be switched;

33. The apparatus of claim 32, wherein the resource requirement request further carries QoS information of the UE to be switched,

the processing module is further configured to determine, according to the service quality information of the user equipment to be switched, the amount of resources provided by the target base station for the user equipment;

34. A system for network slice management, comprising: the network slice management function device of any of claims 21-24, and a network slice subnet management function device;

the network slice subnet management function device is used for receiving a first switching configuration message sent by the network slice management function device, wherein the first switching configuration message carries information containing the target network slice subnet;

the network slice subnet management function device is further configured to send a second handover configuration message to the source base station according to the first handover configuration message.

35. The system according to claim 34, wherein said first handover configuration message further comprises a correspondence of a user equipment to be handed over to a target base station,

the network slice subnet management function device is further used for determining user equipment to be switched for accessing each source base station,

the second handover configuration message comprises: and accessing the corresponding relation between the user equipment to be switched of the source base station receiving the second switching configuration message and the target base station.

36. The system of any of claims 34-35, further comprising one or more source base stations, wherein any of the one or more source base stations is configured to receive the second handover configuration message and send a request for a network handover to a target base station according to the second handover configuration message.

37. A system for network slice, network slice subnet management, comprising: a network slice management function device according to any of claims 25-28 and a network slice subnet management function device according to any of claims 29-33.